Set fixed ubuntu version and add name

Author: ePirat

.github/workflows/meson.yml

@@ -12,9 +12,10 @@ env:
 
 jobs:
   build:
+    name: "Ubuntu 20.04"
     # You can convert this to a matrix build if you need cross-platform coverage.
     # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v3