Update sigstore version

Author: gfrn

.github/workflows/test-and-publish.yml

@@ -126,7 +126,7 @@ jobs:
           name: package-distributions
           path: dist/
       - name: Sign the dists with Sigstore
-        uses: sigstore/gh-action-sigstore-python@v2.1.1
+        uses: sigstore/gh-action-sigstore-python@v3.2.0
         with:
           inputs: >-
             ./dist/*.tar.gz