add permissions

Signed-off-by: Henrique Graca <999396+hjgraca@users.noreply.github.com>

Author: hjgraca

.github/workflows/build.yml

@@ -10,6 +10,9 @@ defaults:
   run:
     working-directory: ./libraries
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest