Update release action to ubuntu-latest

Author: 2m

.github/workflows/release.yml

@@ -6,7 +6,7 @@ on:  # yamllint disable-line rule:truthy
     types: [published]
 jobs:
   publish:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
       with:
@@ -17,6 +17,7 @@ jobs:
         distribution: temurin
         java-version: 21
         cache: sbt
+    - uses: sbt/setup-sbt@v1
 
     - run: sbt ci-release
       env: