Add actions: read permission for artifact API access

listWorkflowRunArtifacts requires actions scope which is dropped
when permissions are explicitly set.

Co-Authored-By: Claude Opus 4.6 <[email protected]>

Author: JoeMatt

.github/workflows/c-cpp.yml

@@ -7,6 +7,7 @@ on:
     branches: [ master ]
 
 permissions:
+  actions: read
   contents: read
   pull-requests: write