ci: build docs-checklink package in CI to ensure link validity

.github/workflows/check-docs.yml

@@ -19,13 +19,6 @@ jobs:
           - docs-manpages
           - docs-json
     steps:
-      - uses: easimon/maximize-build-space@v10
-        with:
-          overprovision-lvm: true
-          remove-android: true
-          remove-dotnet: true
-          remove-haskell: true
-
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
       - uses: DeterminateSystems/magic-nix-cache-action@main
@@ -49,3 +42,17 @@ jobs:
         with:
           name: "${{ matrix.package }}"
           path: result/share/doc/nvf
+
+flake-docs-linkcheck:
+  name: Validate hyperlinks in documentation sources
+  runs-on: ubuntu-latest
+  steps:
+    - name: Install Nix
+      uses: DeterminateSystems/nix-installer-action@main
+    - uses: DeterminateSystems/magic-nix-cache-action@main
+
+    - uses: actions/checkout@v4
+      name: Checkout
+
+    - name: Build documentation packages
+      run: nix build .#docs-linkcheck -Lv

.github/workflows/manual.yml

@@ -47,7 +47,7 @@ jobs:
       - uses: DeterminateSystems/nix-installer-action@main
       - uses: DeterminateSystems/magic-nix-cache-action@main
       - run: |
-          nix build .#docs
+          nix build .#docs -Lv
           cp -r result/share/doc/nvf public
       - uses: peaceiris/actions-gh-pages@v4
         with: