actions: Add explict permissions.

Author: gorzell

.github/workflows/ci.yml

@@ -4,6 +4,10 @@ on:
   push:
   workflow_dispatch:
 
+permissions:
+  contents: read
+  packages: read
+
 env:
   CARGO_TERM_COLOR: always
 
@@ -20,7 +24,7 @@ jobs:
       run: cargo test --verbose
 
     - name: Lint
-      run: | 
+      run: |
          cargo fmt --all -- --check
          cargo clippy -- --deny warnings -D clippy::unwrap_used
          cargo clippy --tests -- --deny warnings -A clippy::unwrap_used