modified typo in doc mainpage.md
modified typo in doc mainpage.md

fixed indentation

aeneby/RIOT,jfischer-phytec-iot/RIOT,kaleb-himes/RIOT,TobiasFredersdorf/RIOT,Yonezawa-T2/RIOT,backenklee/RIOT,syin2/RIOT,aeneby/RIOT,gautric/RIOT,adrianghc/RIOT,rakendrathapa/RIOT,neiljay/RIOT,Yonezawa-T2/RIOT,miri64/RIOT,OTAkeys/RIOT,kaspar030/RIOT,d00616/RIOT,cladmi/RIOT,adjih/RIOT,mziegert/RIOT,binarylemon/RIOT,kerneltask/RIOT,kYc0o/RIOT,x3ro/RIOT,avmelnikoff/RIOT,stevenj/RIOT,kerneltask/RIOT,mtausig/RIOT,alignan/RIOT,josephnoir/RIOT,Ell-i/RIOT,roberthartung/RIOT,yogo1212/RIOT,lebrush/RIOT,backenklee/RIOT,syin2/RIOT,d00616/RIOT,rfuentess/RIOT,dhruvvyas90/RIOT,jfischer-phytec-iot/RIOT,BytesGalore/RIOT,yogo1212/RIOT,kbumsik/RIOT,neiljay/RIOT,aeneby/RIOT,attdona/RIOT,biboc/RIOT,attdona/RIOT,shady33/RIOT,immesys/RiSyn,RBartz/RIOT,ant9000/RIOT,tfar/RIOT,attdona/RIOT,RubikonAlpha/RIOT,toonst/RIOT,Hyungsin/RIOT-OS,brettswann/RIOT,mtausig/RIOT,lazytech-org/RIOT,FrancescoErmini/RIOT,backenklee/RIOT,Josar/RIOT,rajma996/RIOT,kb2ma/RIOT,zhuoshuguo/RIOT,herrfz/RIOT,alignan/RIOT,authmillenon/RIOT,basilfx/RIOT,toonst/RIOT,dailab/RIOT,avmelnikoff/RIOT,stevenj/RIOT,kaspar030/RIOT,mziegert/RIOT,plushvoxel/RIOT,neumodisch/RIOT,basilfx/RIOT,smlng/RIOT,BytesGalore/RIOT,yogo1212/RIOT,wentaoshang/RIOT,jasonatran/RIOT,MohmadAyman/RIOT,josephnoir/RIOT,immesys/RiSyn,stevenj/RIOT,RIOT-OS/RIOT,gebart/RIOT,kbumsik/RIOT,biboc/RIOT,MohmadAyman/RIOT,katezilla/RIOT,OTAkeys/RIOT,neumodisch/RIOT,katezilla/RIOT,MohmadAyman/RIOT,A-Paul/RIOT,OlegHahm/RIOT,attdona/RIOT,dhruvvyas90/RIOT,dkm/RIOT,l3nko/RIOT,smlng/RIOT,mziegert/RIOT,altairpearl/RIOT,hamilton-mote/RIOT-OS,aeneby/RIOT,OlegHahm/RIOT,dailab/RIOT,hamilton-mote/RIOT-OS,neumodisch/RIOT,shady33/RIOT,Yonezawa-T2/RIOT,gebart/RIOT,altairpearl/RIOT,mfrey/RIOT,rajma996/RIOT,kaspar030/RIOT,wentaoshang/RIOT,TobiasFredersdorf/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,asanka-code/RIOT,plushvoxel/RIOT,tfar/RIOT,Josar/RIOT,RBartz/RIOT,beurdouche/RIOT,jremmert-phytec-iot/RIOT,aeneby/RIOT,hamilton-mote/RIOT-OS,yogo1212/RIOT,jasonatran/RIOT,mziegert/RIOT,plushvoxel/RIOT,herrfz/RIOT,jfischer-phytec-iot/RIOT,wentaoshang/RIOT,x3ro/RIOT,katezilla/RIOT,dkm/RIOT,beurdouche/RIOT,shady33/RIOT,Josar/RIOT,adrianghc/RIOT,LudwigKnuepfer/RIOT,kaspar030/RIOT,d00616/RIOT,stevenj/RIOT,miri64/RIOT,syin2/RIOT,neumodisch/RIOT,jfischer-phytec-iot/RIOT,LudwigOrtmann/RIOT,josephnoir/RIOT,gebart/RIOT,kaleb-himes/RIOT,RubikonAlpha/RIOT,miri64/RIOT,A-Paul/RIOT,OTAkeys/RIOT,avmelnikoff/RIOT,backenklee/RIOT,plushvoxel/RIOT,LudwigKnuepfer/RIOT,wentaoshang/RIOT,A-Paul/RIOT,mziegert/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,basilfx/RIOT,gebart/RIOT,binarylemon/RIOT,kYc0o/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,mtausig/RIOT,brettswann/RIOT,beurdouche/RIOT,asanka-code/RIOT,MohmadAyman/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,l3nko/RIOT,immesys/RiSyn,zhuoshuguo/RIOT,lebrush/RIOT,Hyungsin/RIOT-OS,plushvoxel/RIOT,Yonezawa-T2/RIOT,thomaseichinger/RIOT,authmillenon/RIOT,Yonezawa-T2/RIOT,rousselk/RIOT,d00616/RIOT,roberthartung/RIOT,cladmi/RIOT,avmelnikoff/RIOT,toonst/RIOT,rousselk/RIOT,RubikonAlpha/RIOT,ant9000/RIOT,brettswann/RIOT,gautric/RIOT,altairpearl/RIOT,herrfz/RIOT,thomaseichinger/RIOT,rajma996/RIOT,l3nko/RIOT,RubikonAlpha/RIOT,LudwigKnuepfer/RIOT,rakendrathapa/RIOT,tfar/RIOT,lebrush/RIOT,rakendrathapa/RIOT,mfrey/RIOT,rajma996/RIOT,rakendrathapa/RIOT,kb2ma/RIOT,ks156/RIOT,lebrush/RIOT,malosek/RIOT,smlng/RIOT,x3ro/RIOT,wentaoshang/RIOT,LudwigOrtmann/RIOT,LudwigOrtmann/RIOT,ks156/RIOT,immesys/RiSyn,lazytech-org/RIOT,dkm/RIOT,OlegHahm/RIOT,rajma996/RIOT,ant9000/RIOT,FrancescoErmini/RIOT,kb2ma/RIOT,immesys/RiSyn,herrfz/RIOT,rousselk/RIOT,ant9000/RIOT,LudwigOrtmann/RIOT,zhuoshuguo/RIOT,rakendrathapa/RIOT,BytesGalore/RIOT,herrfz/RIOT,kYc0o/RIOT,thomaseichinger/RIOT,gautric/RIOT,stevenj/RIOT,jremmert-phytec-iot/RIOT,alignan/RIOT,adjih/RIOT,TobiasFredersdorf/RIOT,brettswann/RIOT,lazytech-org/RIOT,BytesGalore/RIOT,dhruvvyas90/RIOT,RIOT-OS/RIOT,jremmert-phytec-iot/RIOT,yogo1212/RIOT,josephnoir/RIOT,malosek/RIOT,TobiasFredersdorf/RIOT,adjih/RIOT,hamilton-mote/RIOT-OS,asanka-code/RIOT,malosek/RIOT,zhuoshuguo/RIOT,malosek/RIOT,LudwigKnuepfer/RIOT,authmillenon/RIOT,asanka-code/RIOT,katezilla/RIOT,basilfx/RIOT,katezilla/RIOT,neiljay/RIOT,toonst/RIOT,thomaseichinger/RIOT,kbumsik/RIOT,adrianghc/RIOT,herrfz/RIOT,kaleb-himes/RIOT,smlng/RIOT,dkm/RIOT,lebrush/RIOT,adrianghc/RIOT,TobiasFredersdorf/RIOT,toonst/RIOT,dhruvvyas90/RIOT,rfuentess/RIOT,kaspar030/RIOT,stevenj/RIOT,immesys/RiSyn,x3ro/RIOT,OTAkeys/RIOT,Yonezawa-T2/RIOT,rfuentess/RIOT,rakendrathapa/RIOT,RIOT-OS/RIOT,d00616/RIOT,RubikonAlpha/RIOT,RBartz/RIOT,jremmert-phytec-iot/RIOT,jasonatran/RIOT,gautric/RIOT,jbeyerstedt/RIOT-OTA-update,mfrey/RIOT,lazytech-org/RIOT,roberthartung/RIOT,mziegert/RIOT,neiljay/RIOT,biboc/RIOT,asanka-code/RIOT,tfar/RIOT,kbumsik/RIOT,ant9000/RIOT,attdona/RIOT,syin2/RIOT,gebart/RIOT,attdona/RIOT,miri64/RIOT,kbumsik/RIOT,malosek/RIOT,Hyungsin/RIOT-OS,ks156/RIOT,alignan/RIOT,Ell-i/RIOT,kerneltask/RIOT,rfuentess/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,jbeyerstedt/RIOT-OTA-update,neumodisch/RIOT,LudwigOrtmann/RIOT,l3nko/RIOT,jbeyerstedt/RIOT-OTA-update,wentaoshang/RIOT,BytesGalore/RIOT,authmillenon/RIOT,syin2/RIOT,RBartz/RIOT,RBartz/RIOT,kb2ma/RIOT,MohmadAyman/RIOT,alignan/RIOT,binarylemon/RIOT,lazytech-org/RIOT,x3ro/RIOT,Hyungsin/RIOT-OS,RIOT-OS/RIOT,kaleb-himes/RIOT,roberthartung/RIOT,kerneltask/RIOT,ks156/RIOT,altairpearl/RIOT,dailab/RIOT,jfischer-phytec-iot/RIOT,asanka-code/RIOT,shady33/RIOT,Ell-i/RIOT,FrancescoErmini/RIOT,binarylemon/RIOT,zhuoshuguo/RIOT,rfuentess/RIOT,biboc/RIOT,l3nko/RIOT,cladmi/RIOT,kb2ma/RIOT,adjih/RIOT,mfrey/RIOT,smlng/RIOT,binarylemon/RIOT,jremmert-phytec-iot/RIOT,miri64/RIOT,zhuoshuguo/RIOT,kYc0o/RIOT,avmelnikoff/RIOT,RBartz/RIOT,jbeyerstedt/RIOT-OTA-update,brettswann/RIOT,yogo1212/RIOT,altairpearl/RIOT,FrancescoErmini/RIOT,beurdouche/RIOT,thomaseichinger/RIOT,shady33/RIOT,brettswann/RIOT,l3nko/RIOT,dhruvvyas90/RIOT,FrancescoErmini/RIOT,roberthartung/RIOT,adjih/RIOT,kYc0o/RIOT,binarylemon/RIOT,cladmi/RIOT,jasonatran/RIOT,dailab/RIOT,altairpearl/RIOT,cladmi/RIOT,shady33/RIOT,FrancescoErmini/RIOT,Ell-i/RIOT,basilfx/RIOT,rousselk/RIOT,Ell-i/RIOT,A-Paul/RIOT,mtausig/RIOT,Hyungsin/RIOT-OS,rousselk/RIOT,jremmert-phytec-iot/RIOT,lebrush/RIOT,RubikonAlpha/RIOT,neumodisch/RIOT,ks156/RIOT,kerneltask/RIOT,neiljay/RIOT,beurdouche/RIOT,adrianghc/RIOT,jasonatran/RIOT,josephnoir/RIOT,OlegHahm/RIOT,kaleb-himes/RIOT,dkm/RIOT,mfrey/RIOT,jbeyerstedt/RIOT-OTA-update,dailab/RIOT,d00616/RIOT,gautric/RIOT,MohmadAyman/RIOT,dhruvvyas90/RIOT,authmillenon/RIOT,Josar/RIOT,rousselk/RIOT,malosek/RIOT,biboc/RIOT,hamilton-mote/RIOT-OS,mtausig/RIOT,OTAkeys/RIOT,backenklee/RIOT,tfar/RIOT,LudwigKnuepfer/RIOT,A-Paul/RIOT,LudwigOrtmann/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,OlegHahm/RIOT,Josar/RIOT,rajma996/RIOT