ci(NODE-4872): add permissions to dependency check workflow (mongodb#3483)

Co-authored-by: Bailey Pearson <[email protected]>

Author: sashashura

.github/workflows/dependencies.yml

@@ -5,6 +5,10 @@ on:
     branches: [ "main" ]
   pull_request:
     branches: [ "main" ]
+
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest