Add a comment

Author: ConstanceBeguier

.github/workflows/ci.yml

@@ -67,6 +67,7 @@ jobs:
         run: cargo add lazy_static --no-default-features --features "spin_no_std"
       - name: Add typenum
         working-directory: ./ci-build
+        # typenum is already no_std; no feature needed
         run: cargo add typenum --no-default-features
       - name: Show Cargo.toml for the synthetic crate
         working-directory: ./ci-build