Update container in hex action

Author: prefiks

.github/workflows/hexpm-release.yml

@@ -53,7 +53,7 @@ jobs:
         env:
           HEX_API_KEY: ${{ secrets.HEX_API_KEY }}
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: rebar-files