Bazel glossary: use h3 instead of h4 to prepare for jekyll-toc
Bazel glossary: use h3 instead of h4 to prepare for jekyll-toc

RELNOTES: None
PiperOrigin-RevId: 296307936

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