Update Github action runners

Author: rdavid

.github/workflows/test.yml

@@ -5,7 +5,9 @@ jobs:
   test-linux:
     strategy:
       matrix:
-        os: [ubuntu-20.04, ubuntu-22.04, ubuntu-24.04]
+        os:
+          - ubuntu-22.04
+          - ubuntu-24.04
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -32,7 +34,10 @@ jobs:
   test-macos:
     strategy:
       matrix:
-        os: [macos-13, macos-14, macos-15]
+        os:
+          - macos-13
+          - macos-14
+          - macos-15
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4