README: urge bug reporters to always mention the isl version
README: urge bug reporters to always mention the isl version

Signed-off-by: Sven Verdoolaege <e5350bbed4977f5eb8ae1dc6abd9ae59d21ace75@kotnet.org>

BenzoSM/isl,Meinersbur/isl,BenzoSM/isl,Distrotech/isl,Meinersbur/isl,inducer/isl-mirror,simbuerg/isl,crossbuild/isl,crossbuild/isl,simbuerg/isl,Distrotech/isl,BenzoSM/isl,Meinersbur/isl,SaberMod/isl-current,nicolasvasilache/isl,jleben/isl,jleben/isl,simbuerg/isl,crossbuild/isl,evaautomation/isl,PollyLabs/isl,nicolasvasilache/isl,evaautomation/isl,nicolasvasilache/isl,KangDroidSMProject/ISL,Meinersbur/isl,tobig/isl,simbuerg/isl,PollyLabs/isl,PollyLabs/isl,KangDroidSMProject/ISL,crossbuild/isl,inducer/isl-mirror,nicolasvasilache/isl,tobig/isl,Distrotech/isl,UBERTC/isl,SaberMod/isl-current,UBERTC/isl,PollyLabs/isl,abduld/isl,Distrotech/isl,jleben/isl,jleben/isl,inducer/isl-mirror,SaberMod/isl-current,KangDroidSMProject/ISL,abduld/isl,UBERTC/isl,KangDroidSMProject/ISL,nicolasvasilache/isl,UBERTC/isl,inducer/isl-mirror,jleben/isl,BenzoSM/isl,PollyLabs/isl,tobig/isl,tobig/isl,evaautomation/isl,abduld/isl,inducer/isl-mirror,BenzoSM/isl,Distrotech/isl,SaberMod/isl-current,simbuerg/isl,evaautomation/isl,abduld/isl,KangDroidSMProject/ISL