Upgrade to ubuntu latest

Author: thesamet

.github/workflows/release.yml

@@ -137,7 +137,7 @@ jobs:
 
   gh_release:
     if: startsWith(github.ref, 'refs/tags/v')
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     needs: [native, scalapbc]
     steps:
     - uses: actions/checkout@v4