ci: update arm64 runner to ubuntu-24.04-arm64

This commit updates the Github actions runner for tests on arm64 from
`ubuntu-22.04-arm64` (kernel v6.5) to `ubuntu-24.04-arm64` (kernel v6.8).

Signed-off-by: Simone Magnani <simone.magnani@isovalent.com>

Author: smagnani96

.github/workflows/ci.yml

@@ -151,7 +151,7 @@ jobs:
 
   test-on-arm64:
     name: Run tests on arm64
-    runs-on: ubuntu-22.04-arm64
+    runs-on: ubuntu-24.04-arm64
     needs: build-and-lint
     timeout-minutes: 15
     env: