Minor doc/comment edits

Author: sean-parent

README.md

@@ -172,7 +172,7 @@ cpp_library_setup(
 ### Documentation Features
 
 - **Doxygen integration** with modern configuration
-- **doxygen-awesome-css@2.3.4** theme for beautiful output
+- **doxygen-awesome-css@2.4.0** theme for beautiful output
 - **Symbol exclusion** support for implementation details
 - **GitHub Pages deployment** via CI
 - **Custom Doxyfile support** (falls back to template)

cpp-library.cmake

@@ -34,6 +34,7 @@ function(_cpp_library_setup_executables)
 
     # Download doctest dependency via CPM
     if(NOT TARGET doctest::doctest)
+        # https://github.com/doctest/doctest
         CPMAddPackage("gh:doctest/[email protected]")
     endif()