Add develop branch link to WebAssembly demo section

Include links to both main and develop deployments so users can
see both stable and development versions of the demo.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: lefticus

.github/template/README.md

@@ -9,7 +9,9 @@
 
 ## WebAssembly Demo
 
-Try the live WebAssembly demo: [https://%%myorg%%.github.io/%%myproject%%/](https://%%myorg%%.github.io/%%myproject%%/)
+Try the live WebAssembly demo:
+- Main: [https://%%myorg%%.github.io/%%myproject%%/](https://%%myorg%%.github.io/%%myproject%%/)
+- Develop: [https://%%myorg%%.github.io/%%myproject%%/develop/](https://%%myorg%%.github.io/%%myproject%%/develop/)
 
 The `main` branch deploys to the root, `develop` to `/develop/`, and tags to `/tagname/`.
 

README.md

@@ -22,7 +22,9 @@ It includes
  * large GitHub action testing matrix
  * WebAssembly build support with automatic GitHub Pages deployment
 
-**Live Demo:** If you enable GitHub Pages in your project created from this template, you'll have a working example like this: [https://cpp-best-practices.github.io/cmake_template/](https://cpp-best-practices.github.io/cmake_template/)
+**Live Demo:** If you enable GitHub Pages in your project created from this template, you'll have a working example like this:
+- Main: [https://cpp-best-practices.github.io/cmake_template/](https://cpp-best-practices.github.io/cmake_template/)
+- Develop: [https://cpp-best-practices.github.io/cmake_template/develop/](https://cpp-best-practices.github.io/cmake_template/develop/)
 
 The `main` branch deploys to the root, `develop` to `/develop/`, and tags to `/tagname/`.