ci: use actions/checkout@v4 and actions/setup-python@v5

Use actions/checkout@v4 and actions/setup-python@v5 when checking out
and setting up the example-application repository in CI. The new
versions uses Node20 instead of the deprecated Node16.

Signed-off-by: Henrik Brix Andersen <[email protected]>

Author: henrikbrixandersen

.github/workflows/build.yml

@@ -15,12 +15,12 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: example-application
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: 3.11