Add cpp-linter.yml to workflow paths

Include cpp-linter.yml in the paths for pull requests and pushes.

Author: hhvrc

.github/workflows/cpp-linter.yml

@@ -3,9 +3,9 @@ name: cpp-linter
 on:
   pull_request:
     types: [opened, reopened, synchronize]
-    paths: ['**.c', '**.h', '**.cpp', '**.hpp', '.clang-format']
+    paths: ['**.c', '**.h', '**.cpp', '**.hpp', '.clang-format', '.github/workflows/cpp-linter.yml']
   push:
-    paths: ['**.c', '**.h', '**.cpp', '**.hpp', '.clang-format']
+    paths: ['**.c', '**.h', '**.cpp', '**.hpp', '.clang-format', '.github/workflows/cpp-linter.yml']
   workflow_dispatch: # Manually invoked by user.
 
 jobs: