Merge pull request #10 from rossaddison/alert-autofix-4

Potential fix for code scanning alert no. 4: Workflow does not contain permissions

Author: rossaddison

.github/workflows/mutation.yml

@@ -20,6 +20,9 @@ on:
 
 name: mutation test
 
+permissions:
+  contents: read
+
 jobs:
   mutation:
     uses: yiisoft/actions/.github/workflows/roave-infection.yml@master