gnrc: fix typos in README of gnrc_networking example.
gnrc: fix typos in README of gnrc_networking example.

aeneby/RIOT,miri64/RIOT,A-Paul/RIOT,kerneltask/RIOT,RIOT-OS/RIOT,kaspar030/RIOT,smlng/RIOT,mtausig/RIOT,ks156/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,adjih/RIOT,gautric/RIOT,dkm/RIOT,roberthartung/RIOT,aeneby/RIOT,LudwigKnuepfer/RIOT,jasonatran/RIOT,neumodisch/RIOT,lazytech-org/RIOT,authmillenon/RIOT,mfrey/RIOT,toonst/RIOT,jfischer-phytec-iot/RIOT,authmillenon/RIOT,kaspar030/RIOT,mtausig/RIOT,LudwigOrtmann/RIOT,RIOT-OS/RIOT,syin2/RIOT,toonst/RIOT,gautric/RIOT,beurdouche/RIOT,plushvoxel/RIOT,jfischer-phytec-iot/RIOT,aeneby/RIOT,basilfx/RIOT,basilfx/RIOT,Josar/RIOT,LudwigKnuepfer/RIOT,adrianghc/RIOT,LudwigOrtmann/RIOT,cladmi/RIOT,TobiasFredersdorf/RIOT,thomaseichinger/RIOT,roberthartung/RIOT,hamilton-mote/RIOT-OS,LudwigOrtmann/RIOT,dkm/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,kbumsik/RIOT,kYc0o/RIOT,ant9000/RIOT,avmelnikoff/RIOT,plushvoxel/RIOT,Ell-i/RIOT,BytesGalore/RIOT,immesys/RiSyn,kaleb-himes/RIOT,Josar/RIOT,kaleb-himes/RIOT,kYc0o/RIOT,kaspar030/RIOT,adjih/RIOT,jbeyerstedt/RIOT-OTA-update,neumodisch/RIOT,syin2/RIOT,gebart/RIOT,neumodisch/RIOT,immesys/RiSyn,dailab/RIOT,kerneltask/RIOT,OTAkeys/RIOT,neiljay/RIOT,authmillenon/RIOT,dkm/RIOT,TobiasFredersdorf/RIOT,cladmi/RIOT,dailab/RIOT,lazytech-org/RIOT,jasonatran/RIOT,LudwigOrtmann/RIOT,mfrey/RIOT,OlegHahm/RIOT,kerneltask/RIOT,lazytech-org/RIOT,rfuentess/RIOT,yogo1212/RIOT,cladmi/RIOT,adrianghc/RIOT,immesys/RiSyn,beurdouche/RIOT,TobiasFredersdorf/RIOT,beurdouche/RIOT,kbumsik/RIOT,Hyungsin/RIOT-OS,avmelnikoff/RIOT,ant9000/RIOT,LudwigOrtmann/RIOT,toonst/RIOT,josephnoir/RIOT,kaleb-himes/RIOT,roberthartung/RIOT,OlegHahm/RIOT,kYc0o/RIOT,Hyungsin/RIOT-OS,jasonatran/RIOT,x3ro/RIOT,ant9000/RIOT,josephnoir/RIOT,Ell-i/RIOT,roberthartung/RIOT,rfuentess/RIOT,kaleb-himes/RIOT,plushvoxel/RIOT,LudwigKnuepfer/RIOT,OTAkeys/RIOT,immesys/RiSyn,ant9000/RIOT,BytesGalore/RIOT,neiljay/RIOT,toonst/RIOT,syin2/RIOT,RIOT-OS/RIOT,miri64/RIOT,ks156/RIOT,yogo1212/RIOT,Ell-i/RIOT,ks156/RIOT,neumodisch/RIOT,basilfx/RIOT,kbumsik/RIOT,avmelnikoff/RIOT,syin2/RIOT,OlegHahm/RIOT,ant9000/RIOT,gautric/RIOT,A-Paul/RIOT,adjih/RIOT,OTAkeys/RIOT,syin2/RIOT,Hyungsin/RIOT-OS,josephnoir/RIOT,LudwigOrtmann/RIOT,x3ro/RIOT,avmelnikoff/RIOT,adrianghc/RIOT,smlng/RIOT,kaspar030/RIOT,biboc/RIOT,authmillenon/RIOT,TobiasFredersdorf/RIOT,hamilton-mote/RIOT-OS,mfrey/RIOT,jfischer-phytec-iot/RIOT,A-Paul/RIOT,kerneltask/RIOT,josephnoir/RIOT,ks156/RIOT,thomaseichinger/RIOT,x3ro/RIOT,x3ro/RIOT,basilfx/RIOT,kbumsik/RIOT,yogo1212/RIOT,biboc/RIOT,mfrey/RIOT,toonst/RIOT,immesys/RiSyn,rfuentess/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,jfischer-phytec-iot/RIOT,adrianghc/RIOT,hamilton-mote/RIOT-OS,BytesGalore/RIOT,kbumsik/RIOT,Josar/RIOT,jbeyerstedt/RIOT-OTA-update,adjih/RIOT,A-Paul/RIOT,neiljay/RIOT,smlng/RIOT,kYc0o/RIOT,miri64/RIOT,smlng/RIOT,cladmi/RIOT,RIOT-OS/RIOT,gebart/RIOT,dailab/RIOT,gebart/RIOT,rfuentess/RIOT,gautric/RIOT,mtausig/RIOT,beurdouche/RIOT,immesys/RiSyn,plushvoxel/RIOT,lazytech-org/RIOT,ks156/RIOT,aeneby/RIOT,hamilton-mote/RIOT-OS,smlng/RIOT,dkm/RIOT,neumodisch/RIOT,adrianghc/RIOT,authmillenon/RIOT,neumodisch/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,avmelnikoff/RIOT,yogo1212/RIOT,Ell-i/RIOT,biboc/RIOT,biboc/RIOT,authmillenon/RIOT,rfuentess/RIOT,roberthartung/RIOT,kerneltask/RIOT,TobiasFredersdorf/RIOT,kaleb-himes/RIOT,yogo1212/RIOT,LudwigKnuepfer/RIOT,thomaseichinger/RIOT,plushvoxel/RIOT,lazytech-org/RIOT,thomaseichinger/RIOT,beurdouche/RIOT,jbeyerstedt/RIOT-OTA-update,mtausig/RIOT,gautric/RIOT,neiljay/RIOT,josephnoir/RIOT,jbeyerstedt/RIOT-OTA-update,OTAkeys/RIOT,LudwigKnuepfer/RIOT,dailab/RIOT,basilfx/RIOT,jfischer-phytec-iot/RIOT,biboc/RIOT,OTAkeys/RIOT,x3ro/RIOT,thomaseichinger/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,BytesGalore/RIOT,hamilton-mote/RIOT-OS,miri64/RIOT,adjih/RIOT,OlegHahm/RIOT,Ell-i/RIOT,Hyungsin/RIOT-OS,foss-for-synopsys-dwc-arc-processors/RIOT,gebart/RIOT,jasonatran/RIOT,BytesGalore/RIOT,yogo1212/RIOT,OlegHahm/RIOT,Hyungsin/RIOT-OS,cladmi/RIOT,dailab/RIOT,gebart/RIOT,neiljay/RIOT,kaspar030/RIOT,Josar/RIOT,Josar/RIOT,dkm/RIOT,aeneby/RIOT,A-Paul/RIOT,mtausig/RIOT,jasonatran/RIOT,miri64/RIOT,mfrey/RIOT,jbeyerstedt/RIOT-OTA-update