[FIX] Fix compilation error: Added missing + operator (#732)

## Description

Hotfix for compilation error. Readied +operator 

### Introduces a breaking change?

- [x] Yes
- [ ] No

### Type of change

- [x] Bug fix (change which fixes an issue)
- [ ] New feature (change which adds functionality)
- [ ] Documentation update (improves or adds clarity to existing
documentation)
- [ ] Other (chores, tests, code style improvements etc.)

### Tested on

- [x] iOS
- [x] Android

Author: benITo47

packages/react-native-executorch/common/rnexecutorch/models/ocr/Recognizer.cpp

@@ -32,7 +32,7 @@ Recognizer::generate(const cv::Mat &grayImage, int32_t inputWidth) {
   auto shapes = getAllInputShapes(method_name);
   if (shapes.empty()) {
     throw std::runtime_error("Recognizer model: Input shapes for  " +
-                             method_name " not found");
+                             method_name + " not found");
   }
   std::vector<int32_t> tensorDims = shapes[0];
   TensorPtr inputTensor =