ci/release: pin softprops/action-gh-release to v2.2.2

See https://github.com/softprops/action-gh-release/issues/628

Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>

.github/workflows/release.yml

@@ -130,6 +130,6 @@ jobs:
         run: ls -R
 
       - name: Create release
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@v2.2.2
         with:
           files: artifacts-*/*