ci: declare contents:read on Build Actions workflow (#351)

Signed-off-by: Arpit Jain <arpitjain099@gmail.com>

Author: arpitjain099

.github/workflows/builds.yml

@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [master]
 
+permissions:
+  contents: read
+
 jobs:
   run:
     name: Test on ${{ matrix.os }} - ${{ matrix.version }}