Update slsa provenance action

Author: j-fuentes

.github/workflows/release-master.yml

@@ -89,7 +89,7 @@ jobs:
     - name: Create mock artifact
       run: echo "foobar" > mock
     - name: Generate provenance
-      uses: philips-labs/SLSA-Provenance-Action@752766b8a3b1ebd09d599e163eeec8fa39e677aa
+      uses: philips-labs/SLSA-Provenance-Action@v0.8.0
       with:
         command: generate
         subcommand: files