Bump sigstore version (#76)

Author: CTY-git

.github/workflows/release.yml

@@ -65,7 +65,7 @@ jobs:
           path: dist/
 
       - name: Sign the dists with Sigstore
-        uses: sigstore/gh-action-sigstore-python@v1.2.3
+        uses: sigstore/gh-action-sigstore-python@v2.1.1
         with:
           inputs: >-
             ./dist/*.tar.gz