Bazel Docs: Publish release docs for Bazel 6.6.0

PiperOrigin-RevId: 859626660
Change-Id: Ia3d62d463424e526e57e42392672dcaa2b55804b

Author: Googler

site/en/versions/_toc.yaml

@@ -11,7 +11,7 @@ toc:
   path: /versions/8.2.0
 - label: '7.7'
   path: /versions/7.7.0
-- label: '6.5'
-  path: /versions/6.5.0
+- label: '6.6'
+  path: /versions/6.6.0
 - label: "5.4.1"
-  path: https://docs.bazel.build/versions/5.4.1/bazel-overview.html
+  path: https://docs.bazel.build/versions/5.4.1/bazel-overview.html