Potential fix for code scanning alert no. 4: Workflow does not contain permissions (#126)

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

Author: jperals

.github/workflows/visual-regression.yml

@@ -9,6 +9,10 @@ on:
       - main
   merge_group:
 
+permissions:
+  contents: read
+  actions: write
+
 env:
   VISUAL_REGRESSION_SNAPSHOT_DIRECTORY: "__image_snapshots__"