let mypy pass on 3.10

Author: mshafer-NI

check-project-links/_find_project_links.py

@@ -8,7 +8,7 @@
 from urllib.parse import urlsplit
 
 try:
-    import tomllib
+    import tomllib  # type: ignore[import-not-found]
 except ModuleNotFoundError:  # pragma: no cover
     raise Exception("tomllib is not available. Please use Python 3.11 or later.")