Merge branch 'renovate/wordpress-wordpress-5.x' into 'main'

Update dependency WordPress/WordPress to v5.9.1

See merge request !113

values.yaml

@@ -90,7 +90,7 @@ wordpress:
       pssw: CHANGE-THIS-PASSWORD
       email: mail@example.com
   site:
-    version: 5.8.3
+    version: 5.9.1
     multilingual:
       enabled: false
       # Plugins for WPML