Add documentation data for 0.29.1 release.

Closes #9361.

PiperOrigin-RevId: 268943029
diff --git a/site/_config.yml b/site/_config.yml
index 53ca7b6..41437d7 100644
--- a/site/_config.yml
+++ b/site/_config.yml
@@ -11,11 +11,12 @@
 gems: [jekyll-paginate]
 
 # Update this to the newest release for the default docs.bazel.build version.
-version: "0.29.0"
+version: "0.29.1"
 
 # This must be kept in sync with //scripts/docs:doc_versions.bzl
 doc_versions:
   - master
+  - 0.29.1
   - 0.29.0
   - 0.28.0
   - 0.27.0