.github: workflows: build restrict permissions

Restrict default permission of the build workflows.
Additionally, add a name to the build job.

Signed-off-by: Thomas Stranger <thomas.stranger@outlook.com>

Author: str4t0m

.github/workflows/build.yml

@@ -6,8 +6,12 @@ on:
   schedule:
     - cron: "0 0 * * *"
 
+permissions:
+  contents: read
+
 jobs:
   build:
+    name: Build app and tests
     strategy:
       fail-fast: false
       matrix:
@@ -18,6 +22,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           path: example-application
+          persist-credentials: false
 
       - name: Set up Python
         uses: actions/setup-python@v5