Fix pull request template
Fix pull request template

https://github.com/servo/servo/pull/20692/commits/8146850215db325e0529d0ed4fbb663743f60542

cbrewster/servo,saneyuki/servo,szeged/servo,ConnorGBrewster/servo,szeged/servo,ConnorGBrewster/servo,szeged/servo,saneyuki/servo,splav/servo,cbrewster/servo,dati91/servo,notriddle/servo,nnethercote/servo,dati91/servo,mbrubeck/servo,KiChjang/servo,jimberlage/servo,peterjoel/servo,SimonSapin/servo,splav/servo,peterjoel/servo,pyfisch/servo,SimonSapin/servo,dati91/servo,emilio/servo,szeged/servo,notriddle/servo,canaltinova/servo,mbrubeck/servo,dati91/servo,KiChjang/servo,emilio/servo,ConnorGBrewster/servo,pyfisch/servo,cbrewster/servo,emilio/servo,notriddle/servo,mbrubeck/servo,cbrewster/servo,saneyuki/servo,emilio/servo,peterjoel/servo,nnethercote/servo,jimberlage/servo,nnethercote/servo,sadmansk/servo,DominoTree/servo,canaltinova/servo,nnethercote/servo,nnethercote/servo,ConnorGBrewster/servo,peterjoel/servo,splav/servo,larsbergstrom/servo,emilio/servo,dati91/servo,cbrewster/servo,canaltinova/servo,DominoTree/servo,KiChjang/servo,pyfisch/servo,larsbergstrom/servo,peterjoel/servo,pyfisch/servo,larsbergstrom/servo,saneyuki/servo,pyfisch/servo,canaltinova/servo,cbrewster/servo,sadmansk/servo,jimberlage/servo,canaltinova/servo,KiChjang/servo,KiChjang/servo,splav/servo,paulrouget/servo,avadacatavra/servo,pyfisch/servo,paulrouget/servo,SimonSapin/servo,SimonSapin/servo,peterjoel/servo,szeged/servo,notriddle/servo,KiChjang/servo,paulrouget/servo,saneyuki/servo,splav/servo,DominoTree/servo,paulrouget/servo,peterjoel/servo,pyfisch/servo,avadacatavra/servo,emilio/servo,splav/servo,peterjoel/servo,mbrubeck/servo,saneyuki/servo,ConnorGBrewster/servo,pyfisch/servo,szeged/servo,splav/servo,notriddle/servo,sadmansk/servo,szeged/servo,notriddle/servo,DominoTree/servo,ConnorGBrewster/servo,DominoTree/servo,nnethercote/servo,nnethercote/servo,nnethercote/servo,avadacatavra/servo,sadmansk/servo,DominoTree/servo,KiChjang/servo,sadmansk/servo,cbrewster/servo,avadacatavra/servo,jimberlage/servo,mbrubeck/servo,saneyuki/servo,splav/servo,KiChjang/servo,dati91/servo,emilio/servo,ConnorGBrewster/servo,jimberlage/servo,avadacatavra/servo,splav/servo,notriddle/servo,paulrouget/servo,DominoTree/servo,emilio/servo,SimonSapin/servo,DominoTree/servo,nnethercote/servo,DominoTree/servo,jimberlage/servo,SimonSapin/servo,sadmansk/servo,canaltinova/servo,jimberlage/servo,avadacatavra/servo,larsbergstrom/servo,canaltinova/servo,emilio/servo,larsbergstrom/servo,ConnorGBrewster/servo,paulrouget/servo,notriddle/servo,SimonSapin/servo,avadacatavra/servo,splav/servo,KiChjang/servo,emilio/servo,sadmansk/servo,paulrouget/servo,KiChjang/servo,szeged/servo,saneyuki/servo,szeged/servo,jimberlage/servo,peterjoel/servo,cbrewster/servo,pyfisch/servo,larsbergstrom/servo,SimonSapin/servo,paulrouget/servo,jimberlage/servo,larsbergstrom/servo,larsbergstrom/servo,larsbergstrom/servo,DominoTree/servo,mbrubeck/servo,mbrubeck/servo,sadmansk/servo,canaltinova/servo,notriddle/servo,paulrouget/servo,saneyuki/servo,dati91/servo,pyfisch/servo,paulrouget/servo,saneyuki/servo,szeged/servo,mbrubeck/servo,peterjoel/servo,avadacatavra/servo,nnethercote/servo,dati91/servo,notriddle/servo,larsbergstrom/servo