Add note to docs about sphinx-llm

Bumps the all-github-actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 5 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all-github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
   pre-commit:
       runs-on: ubuntu-latest
       steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python 3.10
         uses: actions/setup-python@v6
         with:
@@ -23,7 +23,7 @@ jobs:
         python-version: ['3.9', '3.10', '3.11', '3.12']
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v6

docs/source/getting-started.rst

@@ -84,7 +84,7 @@ For optimal LLM support, see the alternative builders below and the :ref:`CMake
 
 .. rubric:: Footnotes
 
-.. [#sphinxllm] See `sphinx-llm <https://github.com/jacobtomlinson/sphinx-llm>`_ as an alternative for CMake-free Markdown builds.
+.. [#sphinxllm] See `sphinx-llm <https://github.com/NVIDIA/sphinx-llm>`_ as an alternative for CMake-free Markdown builds.
 .. [#native] Uses raw :confval:`_sources/ <sphinx:html_copy_source>` files created by Sphinx's HTML builder with some minor enhancements.
 .. [#autodoc] Directives like ``autodoc`` will appear as raw directive syntax rather than the extracted docstrings.
 .. [#pending] PRs that add ``llms-full.txt`` concatenation support have yet to be released.

docs/source/index.rst

@@ -26,6 +26,11 @@ Highlights
    Filter content, include source code files, or integrate with alternative output formats like Markdown for even better LLM compatibility.
    See :doc:`getting-started` for output format options and :doc:`configuration-values` for all settings.
 
+.. seealso::
+
+   For better default output without configuration, see `sphinx-llm <https://github.com/NVIDIA/sphinx-llm>`_ from NVIDIA.
+   sphinx-llms-txt is best when customized with alternative output formats, content filtering, or source code inclusion.
+
 .. toctree::
    :maxdepth: 2