Potential fix for code scanning alert no. 2: Workflow does not contain permissions

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

Author: tmokmss

.github/workflows/update_snapshot.yml

@@ -6,6 +6,8 @@ on:
     branches:
        - 'dependabot/**'
 
+permissions:
+  contents: write
 jobs:
   update:
     runs-on: ubuntu-latest