do not persist git credentials when not needed

and make explicit when we do need it

Author: 2bndy5

.github/workflows/cpp-linter.yml

@@ -14,6 +14,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3  # v6.0.0
+        with:
+          persist-credentials: false
       - uses: cpp-linter/cpp-linter-action@main
         id: linter
         continue-on-error: true

.github/workflows/release.yml

@@ -24,6 +24,7 @@ jobs:
     steps:
     - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3  # v6.0.0
       with:
+        persist-credentials: true # needed for `git push`
         fetch-depth: 0
         ref: ${{ inputs.ref }}
     - name: Config git name and email

.github/workflows/self-test.yml

@@ -40,6 +40,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3  # v6.0.0
+        with:
+          persist-credentials: false
 
       - name: Cache the build artifacts
         id: cache-build