Trigger CI builds on any changes to CMakeLists.txt

- Ensure pull request builds are triggered for PRs that modify any CMakeLists.txt files in the repository.

.github/workflows/build-ci.yml

@@ -11,6 +11,7 @@ on:
     paths:
     - 'src/**.cpp'
     - 'src/**.h'
+    - '**/CMakeLists.txt'
   release:
     types: [published]