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

See softprops/action-gh-release#628

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

Author: gmarull

.github/workflows/release.yml

@@ -162,6 +162,6 @@ jobs:
         run: ls -R
 
       - name: Create release
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@v2.2.2
         with:
           files: artifacts-*/*