ci: Add ARM runners

Add a GitHub ARM runner for the build tests.

Signed-off-by: Naushir Patuck <[email protected]>

Author: naushir

.github/workflows/libpisp-build-test.yaml

@@ -11,8 +11,11 @@ on:
 
 jobs:
   build-test:
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, ubuntu-24.04-arm ]
 
-    runs-on: [ ubuntu-latest ]
+    runs_on: ${{ matrix.os }}
 
     strategy:
       matrix: