Update main/res/values-pl/strings.xml
Update main/res/values-pl/strings.xml

Spelling and grammatical mistakes corrected.
auricgoldfinger/cgeo,Huertix/cgeo,samueltardieu/cgeo,tobiasge/cgeo,yummy222/cgeo,rsudev/c-geo-opensource,Bananeweizen/cgeo,tobiasge/cgeo,mucek4/cgeo,schwabe/cgeo,KublaikhanGeek/cgeo,superspindel/cgeo,schwabe/cgeo,cgeo/cgeo,superspindel/cgeo,kumy/cgeo,marco-dev/c-geo-opensource,Bananeweizen/cgeo,ThibaultR/cgeo,xiaoyanit/cgeo,SammysHP/cgeo,SammysHP/cgeo,vishwakulkarni/cgeo,matej116/cgeo,xiaoyanit/cgeo,schwabe/cgeo,rsudev/c-geo-opensource,ThibaultR/cgeo,S-Bartfast/cgeo,Bananeweizen/cgeo,yummy222/cgeo,madankb/cgeo,superspindel/cgeo,brok85/cgeo,marco-dev/c-geo-opensource,matej116/cgeo,cgeo/cgeo,pstorch/cgeo,S-Bartfast/cgeo,samueltardieu/cgeo,pstorch/cgeo,rsudev/c-geo-opensource,kumy/cgeo,schwabe/cgeo,madankb/cgeo,KublaikhanGeek/cgeo,ThibaultR/cgeo,lewurm/cgeo,Huertix/cgeo,kumy/cgeo,vishwakulkarni/cgeo,brok85/cgeo,cgeo/cgeo,samueltardieu/cgeo,xiaoyanit/cgeo,lewurm/cgeo,S-Bartfast/cgeo,auricgoldfinger/cgeo,vishwakulkarni/cgeo,marco-dev/c-geo-opensource,brok85/cgeo,Huertix/cgeo,yummy222/cgeo,matej116/cgeo,KublaikhanGeek/cgeo,mucek4/cgeo,tobiasge/cgeo,SammysHP/cgeo,mucek4/cgeo,madankb/cgeo,pstorch/cgeo,auricgoldfinger/cgeo,lewurm/cgeo,cgeo/cgeo