Add new exception [skip ci]

Author: marceloneppel

lib/charms/postgresql_k8s/v0/postgresql_tls.py

@@ -174,7 +174,7 @@ def is_ip_address(address: str) -> bool:
             try:
                 ipaddress.ip_address(address)
                 return True
-            except ValueError:
+            except (ipaddress.AddressValueError, ValueError):
                 return False
 
         unit_id = self.charm.unit.name.split("/")[1]