build(ci): use stable job names

This means that we can upgrade the os without needing
to update branch protection rules

use 'include' to expand the 'os' matrix to include the name
then use the variable as a job name

https://docs.github.com/en/actions/using-jobs/using-a-matrix-for-your-jobs#example-expanding-configurations

Fixes 15371

.github/workflows/tests_unit.yml

@@ -20,14 +20,22 @@ concurrency:
 
 jobs:
   unit:
-    name: JUnit Tests (${{ matrix.os}})
+    name: JUnit Tests (${{ matrix.name }})
     timeout-minutes: 40
     strategy:
       fail-fast: false
       matrix:
         # https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners#supported-runners-and-hardware-resources
         # macOS 14 is in beta and runs on Apple Silicon [M1]
         os: [ubuntu-latest, macos-14, windows-latest]
+        # define 'name' so we don't need to update branch protection rules if the os changes
+        include:
+          - os: ubuntu-latest
+            name: ubuntu
+          - os: macos-14
+            name: macos
+          - os: windows-latest
+            name: windows
     runs-on: ${{ matrix.os }}
     #env:
     #  CODACY_TOKEN: ${{ secrets.CODACY_TOKEN }}