Set permissions to read for coverage
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index a7397b1..46ed6d1 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -17,6 +17,9 @@
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   build: