Update src/pypi_attestations/_impl.py

Co-authored-by: William Woodruff <william@trailofbits.com>

src/pypi_attestations/_impl.py

@@ -514,7 +514,7 @@ def __init__(self, repository: str, workflow_filepath: str) -> None:
         self._repository = repository
         self._workflow_filepath = workflow_filepath
         # This policy must also satisfy some baseline underlying policies:
-        # the issuer must be GitHub Actions, and the repo must be the one
+        # the issuer must be GitLab, and the repo must be the one
         # we expect.
         self._subpolicy = policy.AllOf(
             [