Update src/charm.py

Co-authored-by: Gulsum Atici <[email protected]>

src/charm.py

@@ -211,7 +211,7 @@ def _update_certificate(self, provider_certificate) -> bool:
             self._get_stored_certificate() if self._certificate_is_stored() else ""
         )
 
-        if not existing_certificate == provider_certificate:
+        if existing_certificate != provider_certificate:
             self._store_certificate(certificate=provider_certificate)
             return True
         return False