Point the repository references to its new Gitea home

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tools/src/pop_fem_audit_tools/commands/fetch_artists.py

@@ -218,7 +218,7 @@ class ArtistFetcher:
     """The URL of the Wikidata Query Service SPARQL endpoint."""
     __USER_AGENT: ClassVar[str] = (
         f"pop-fem-audit-tools/{VERSION}"
-        " (https://github.com/imacat/pop-fem-audit;"
+        " (https://gitea.imacat.idv.tw/imacat/pop-fem-audit;"
         " mailto:imacat@mail.imacat.idv.tw)")
     """The User-Agent header sent on every HTTP request."""
     __TIMEOUT: ClassVar[float] = 30.0