docs: remove stray code fence causing incorrect formatting
docs: remove stray code fence causing incorrect formatting

Removes a stray code fence that causes the block to render incorrectly in https://docs.bazel.build/versions/master/configurable-attributes.html#and-chaining

Closes #12468.

PiperOrigin-RevId: 342185570

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