Update mysql charm lib patch; leftover from PR 440 (#443)

Author: shayancanonical

lib/charms/mysql/v0/mysql.py

@@ -116,7 +116,7 @@ def wait_until_mysql_connection(self) -> None:
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 58
+LIBPATCH = 59
 
 UNIT_TEARDOWN_LOCKNAME = "unit-teardown"
 UNIT_ADD_LOCKNAME = "unit-add"