Fix target name in the late bound default migration doc.
Fix target name in the late bound default migration doc.

Two slashes are required after the repository name.

Closes #6406.

PiperOrigin-RevId: 217852223

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