chore: Update charm libraries (#393)

lib/charms/tls_certificates_interface/v4/tls_certificates.py

@@ -52,7 +52,7 @@
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 4
+LIBPATCH = 5
 
 PYDEPS = ["cryptography", "pydantic"]
 
@@ -1030,7 +1030,14 @@ def _mode_is_valid(self, mode: Mode) -> bool:
 
     def _on_secret_remove(self, event: SecretRemoveEvent) -> None:
         """Handle Secret Removed Event."""
-        event.secret.remove_revision(event.revision)
+        try:
+            event.secret.remove_revision(event.revision)
+        except SecretNotFoundError:
+            logger.warning(
+                "No such secret %s, nothing to remove",
+                event.secret.label or event.secret.id,
+            )
+            return
 
     def _on_secret_expired(self, event: SecretExpiredEvent) -> None:
         """Handle Secret Expired Event.