Fix workflow after adding link check

Author: celinval

.github/workflows/book.yml

@@ -23,12 +23,12 @@ jobs:
         run: cargo install mdbook-linkcheck "0.7" --locked
 
       - name: Build Documentation
-        run: mkdbook build
+        run: mkdbook build doc
 
       - name: Upload book
         uses: actions/upload-pages-artifact@v4
         with:
-          path: book/
+          path: book/html
           retention-days: "2"
 
   deploy:

doc/src/SUMMARY.md

@@ -8,8 +8,8 @@
 - [Verification Tools](./tools.md)
   - [Kani](./tools/kani.md)
 
-<!-- [todo](todo.md)>
 
 ---
 
 # Challenges
+- [Coming soon](./todo.md)