Update softprops/action-gh-release action to v2.4.0 (#1013)

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

Author: renovate[bot]

.github/workflows/slsa.yml

@@ -79,7 +79,7 @@ jobs:
           name: ${{ env.REPOSITORY_NAME }}.sha256
 
       - name: Upload asset
-        uses: softprops/action-gh-release@62c96d0c4e8a889135c1f3a25910db8dbe0e85f7 # v2.3.4
+        uses: softprops/action-gh-release@aec2ec56f94eb8180ceec724245f64ef008b89f5 # v2.4.0
         with:
           files: |
             ${{ env.REPOSITORY_NAME }}.sha256