Update .github/workflows/wheels.yml

Author: henryiii

.github/workflows/wheels.yml

@@ -130,7 +130,7 @@ jobs:
         run: ls -lh dist
 
       - name: Generate artifact attestation for sdist and wheels
-        uses: actions/attest-build-provenance@c074443f1aee8d4aeeae555aebba3282517141b2 # v2.2.3
+        uses: actions/attest-build-provenance@v2
         with:
           subject-path: "dist/boost_histogram-*"