Add .hpp extension to review path instructions

Author: softhack007

.coderabbit.yaml

@@ -15,7 +15,7 @@ language: en-US
 
 reviews:
   path_instructions:
-    - path: "**/*.{cpp,h,ino}"
+    - path: "**/*.{cpp,h,hpp,ino}"
       instructions: >
         Follow the C++ coding conventions documented in .github/cpp.instructions.md
         and the general project guidelines in .github/copilot-instructions.md.