fix: Install lychee for pre-commit ci

Author: RemoteRabbit

.github/workflows/ci.yml

@@ -16,6 +16,11 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Install lychee
+        run: |
+          curl -sSf '<https://sh.rustup.rs>' | sh
+          apt install gcc pkg-config libc6-dev libssl-dev
+
       - uses: astral-sh/setup-uv@v8.1.0
         with:
           enable-cache: true
@@ -31,7 +36,4 @@ jobs:
         run: uv run pre-commit run --all-files --show-diff-on-failure
 
       - name: Build site
-        # NOTE: --strict is currently disabled because Zensical (alpha) emits
-        # warnings for GFM-style `> [!note]` blocks and a missing reference
-        # link in examples/code-blocks.md. Re-enable once cleaned up.
         run: uv run zensical build