test on ubuntu-latest

[git-p4: depot-paths = "//dev/main.net/": change = 114091]

Author: fryp

.github/workflows/build.yml

@@ -49,7 +49,7 @@ jobs:
   test-linux:
     name: Test on Linux against Coherence ${{ matrix.coherence_version }}
     needs: build
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix: