Update backward-compatibility.md
Update backward-compatibility.md

two minor spelling corrections

Closes #7554.

PiperOrigin-RevId: 237508658

aehlig/bazel,twitter-forks/bazel,werkt/bazel,cushon/bazel,katre/bazel,aehlig/bazel,aehlig/bazel,davidzchen/bazel,bazelbuild/bazel,akira-baruah/bazel,ulfjack/bazel,dslomov/bazel,ButterflyNetwork/bazel,davidzchen/bazel,dslomov/bazel-windows,katre/bazel,safarmer/bazel,ulfjack/bazel,davidzchen/bazel,cushon/bazel,katre/bazel,safarmer/bazel,akira-baruah/bazel,bazelbuild/bazel,meteorcloudy/bazel,safarmer/bazel,werkt/bazel,dslomov/bazel-windows,werkt/bazel,perezd/bazel,aehlig/bazel,ulfjack/bazel,davidzchen/bazel,perezd/bazel,ButterflyNetwork/bazel,ulfjack/bazel,werkt/bazel,davidzchen/bazel,meteorcloudy/bazel,ButterflyNetwork/bazel,dslomov/bazel-windows,perezd/bazel,bazelbuild/bazel,perezd/bazel,twitter-forks/bazel,bazelbuild/bazel,safarmer/bazel,akira-baruah/bazel,dslomov/bazel,ButterflyNetwork/bazel,aehlig/bazel,davidzchen/bazel,perezd/bazel,werkt/bazel,dslomov/bazel,dslomov/bazel,ButterflyNetwork/bazel,katre/bazel,meteorcloudy/bazel,dslomov/bazel,davidzchen/bazel,akira-baruah/bazel,safarmer/bazel,dslomov/bazel-windows,katre/bazel,perezd/bazel,twitter-forks/bazel,meteorcloudy/bazel,werkt/bazel,cushon/bazel,cushon/bazel,dslomov/bazel,bazelbuild/bazel,katre/bazel,cushon/bazel,ulfjack/bazel,meteorcloudy/bazel,dslomov/bazel-windows,bazelbuild/bazel,cushon/bazel,meteorcloudy/bazel,ulfjack/bazel,perezd/bazel,twitter-forks/bazel,akira-baruah/bazel,aehlig/bazel,aehlig/bazel,ButterflyNetwork/bazel,safarmer/bazel,dslomov/bazel,dslomov/bazel-windows,ulfjack/bazel,meteorcloudy/bazel,twitter-forks/bazel,twitter-forks/bazel,twitter-forks/bazel,akira-baruah/bazel