Bump mdbook and mdbook-toc

Author: lnicola

.github/workflows/ci.yml

@@ -23,11 +23,12 @@ jobs:
       - uses: taiki-e/install-action@v2
         with:
           # don't pin this to a specific version, since we're building `mdbook-toc` below
-          tool: mdbook@0.4
+          tool: mdbook@0.5
 
-      # we can't use `taiki-e/install-action` because the latest release is ancient
-      # no `--locked` so that it picks up a matching `mdbook`
-      - run: cargo install mdbook-toc
+      - uses: taiki-e/install-action@v2
+        with:
+          # don't pin this to a specific version, since we're building `mdbook-toc` below
+          tool: [email protected]
 
       - name: Clone the rust-analyzer repository
         uses: GuillaumeFalourd/[email protected]