fixup! Update handler for mkdocstrings 0.28

Author: pawamoy

mkdocstrings_handlers/vba/_handler.py

@@ -17,7 +17,7 @@
 from griffe import patch_loggers
 from mkdocs.config.defaults import MkDocsConfig
 from mkdocs.exceptions import PluginError
-from mkdocstrings.handlers.base import BaseHandler, CollectionError
+from mkdocstrings import BaseHandler, CollectionError
 from mkdocstrings.loggers import get_logger
 
 from ._crossref import do_crossref, do_multi_crossref