bug #1104 Swap cache configuration params in message_store docs (erik-treehouse)

This PR was merged into the main branch.

Discussion
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 Swap cache configuration params in `message_store` docs

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Docs?         | no <!-- required for new features -->
| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT

The first key of the `message_store` should be the type, e.g. `cache`, `cloudflare`, `doctrine` etc

Commits
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33ebc1d Swap cache configuration params

Author: chr-hertel

docs/bundles/ai-bundle.rst

@@ -1093,8 +1093,8 @@ Message stores are defined in the ``message_store`` section of your configuratio
     ai:
         # ...
         message_store:
-            youtube:
-                cache:
+            cache:
+                youtube:
                     service: 'cache.app'
                     key: 'youtube'