ci(browser): name clippy and rustfmt, which this job actually uses

The browser job lints harness/opfs-contract because it is not a workspace
member and the `test` job's workspace-wide fmt and clippy cannot reach it.
It was relying on the toolchain action's defaults for the two components it
runs. Named, like the `test` job does.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

.github/workflows/ci.yml

@@ -94,6 +94,9 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
         with:
           targets: wasm32-unknown-unknown
+          # Named rather than assumed: this job lints harness/opfs-contract,
+          # which the `test` job's workspace-wide fmt and clippy cannot reach.
+          components: clippy, rustfmt
       - uses: Swatinem/rust-cache@v2
       - uses: actions/setup-node@v4
         with: