[DOC] repository_rules: Minor grammar fix
[DOC] repository_rules: Minor grammar fix

Context: Was perusing after looking here: https://stackoverflow.com/questions/48131363/how-to-integrate-conda-based-python-project-with-bazel

Closes #12572.

PiperOrigin-RevId: 344743100

cushon/bazel,bazelbuild/bazel,perezd/bazel,safarmer/bazel,safarmer/bazel,perezd/bazel,safarmer/bazel,bazelbuild/bazel,meteorcloudy/bazel,twitter-forks/bazel,ButterflyNetwork/bazel,meteorcloudy/bazel,ButterflyNetwork/bazel,twitter-forks/bazel,katre/bazel,twitter-forks/bazel,meteorcloudy/bazel,cushon/bazel,ButterflyNetwork/bazel,perezd/bazel,bazelbuild/bazel,ButterflyNetwork/bazel,perezd/bazel,katre/bazel,bazelbuild/bazel,meteorcloudy/bazel,ButterflyNetwork/bazel,perezd/bazel,meteorcloudy/bazel,cushon/bazel,bazelbuild/bazel,katre/bazel,katre/bazel,twitter-forks/bazel,katre/bazel,safarmer/bazel,cushon/bazel,bazelbuild/bazel,meteorcloudy/bazel,meteorcloudy/bazel,cushon/bazel,twitter-forks/bazel,twitter-forks/bazel,perezd/bazel,katre/bazel,safarmer/bazel,ButterflyNetwork/bazel,safarmer/bazel,perezd/bazel,cushon/bazel,twitter-forks/bazel