chore(deps): update slsa-framework/slsa-github-generator action to v1…

….6.0 (#388)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/release.yml

@@ -149,7 +149,7 @@ jobs:
       actions: read # To read the workflow path.
       id-token: write # To sign the provenance.
       contents: write # To add assets to a release.
-    uses: slsa-framework/slsa-github-generator/.github/workflows/generator_generic_slsa3.yml@v1.5.0
+    uses: slsa-framework/slsa-github-generator/.github/workflows/generator_generic_slsa3.yml@v1.6.0
     with:
       base64-subjects: "${{ needs.provenance-subject.outputs.artifacts-sha256 }}"
       upload-assets: true # Upload to a new release.