[DPE-5047] Backport MLCommons changes (#384)

Updates the snap pinning to consider the newer revision with
2.14.0-ubuntu1. This release contains the backported fixes for plugin
MLCommons.

lib/charms/opensearch/v0/constants_charm.py

@@ -108,7 +108,7 @@
 KibanaserverRole = "kibana_server"
 
 # Opensearch Snap revision
-OPENSEARCH_SNAP_REVISION = 53  # Keep in sync with `workload_version` file
+OPENSEARCH_SNAP_REVISION = 54  # Keep in sync with `workload_version` file
 
 # User-face Backup ID format
 OPENSEARCH_BACKUP_ID_FORMAT = "%Y-%m-%dT%H:%M:%SZ"