fix: harden GitHub Actions workflows

.github/workflows/generator-generic-ossf-slsa3-publish.yml

@@ -60,7 +60,7 @@ 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@v1.4.0
+    uses: slsa-framework/slsa-github-generator/.github/workflows/generator_generic_slsa3.yml@68bad40844440577b33778c9f29077a3388838e9 # v1.4.0
     with:
       base64-subjects: "${{ needs.build.outputs.digests }}"
       upload-assets: true # Optional: Upload to a new release

.github/workflows/lock.yml

@@ -8,6 +8,6 @@ jobs:
   lock:
     runs-on: ubuntu-latest
     steps:
-    - uses: OSDKDev/lock-issues@v1.1
+    - uses: OSDKDev/lock-issues@2372e7b39b61a49bb1980dbd3544837d7d40f01d # v1.1
       with:
         repo-token: "${{ secrets.GITHUB_TOKEN }}"