chore(ci): fix rustdoc preview job

Author: seanmonstar

.github/workflows/rustdoc-preview.yml

@@ -45,12 +45,10 @@ jobs:
           ref: ${{ github.event.pull_request.head.ref }}
 
       - name: Install Rust toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
+      - uses: dtolnay/rust-toolchain@nightly
 
       - name: Build rustdoc
-        run: cargo rustdoc -- --cfg docsrs
+        run: cargo rustdoc --features full -- --cfg docsrs
 
       - name: Deploy rustdoc to gh-pages/pr-<PR_NUMBER>
         uses: peaceiris/actions-gh-pages@v3