Omit "pattern" from missing actions test (#1056).

borgmatic/config/schema.yaml

@@ -923,7 +923,6 @@ properties:
                 - compact
                 - create
                 - recreate
-                - pattern
                 - check
                 - delete
                 - extract

tests/integration/config/test_schema.py

@@ -20,6 +20,7 @@ ACTIONS_MODULE_NAMES_TO_OMIT = {
     'export_key',
     'import_key',
     'json',
+    'pattern',
 }
 ACTIONS_MODULE_NAMES_TO_ADD = {'key', 'umount'}