[bazel] Bump the bazel version to fix a UI bug

See https://github.com/bazelbuild/bazel/issues/13985

Signed-off-by: Miguel Young de la Sota <mcyoung@google.com>
diff --git a/.bazelversion b/.bazelversion
index 6aba2b2..ac14c3d 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-4.2.0
+5.1.1