Add instructions to run versionize-docs in cherrypick doc

docs/devel/cherry-picks.md

@@ -47,6 +47,23 @@ hack/cherry_pick_pull.sh upstream/release-3.14 98765
 This will walk you through the steps to propose an automated cherry pick of pull
  #98765 for remote branch `upstream/release-3.14`.
 
+### Cherrypicking a doc change
+
+If you are cherrypicking a change which adds a doc, then you also need to run
+`build/versionize-docs.sh` in the release branch to versionize that doc.
+Ideally, just running `hack/cherry_pick_pull.sh` should be enough, but we are not there
+yet: [#18861](https://github.com/kubernetes/kubernetes/issues/18861)
+
+To cherrypick PR 123456 to release-1.1, run the following commands after running `hack/cherry_pick_pull.sh` and before merging the PR:
+
+```
+$ git checkout -b automated-cherry-pick-of-#123456-upstream-release-1.1
+  origin/automated-cherry-pick-of-#123456-upstream-release-1.1
+$ ./build/versionize-docs.sh release-1.1
+$ git commit -a -m "Running versionize docs"
+$ git push origin automated-cherry-pick-of-#123456-upstream-release-1.1
+```
+
 ## Cherry Pick Review
 
 Cherry pick pull requests are reviewed differently than normal pull requests. In