Potential fix for code scanning alert no. 5: Workflow does not contain permissions (#65)

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: qdequippe

.github/workflows/diff-spec.yml

@@ -9,6 +9,9 @@ jobs:
     check-spec:
         name: Check SDK is in sync with spec
         runs-on: ubuntu-latest
+        permissions:
+            contents: write
+            pull-requests: write
         steps:
             - name: Checkout
               uses: actions/checkout@v6