Fixed manual build actions name

.github/workflows/cmake_manualbuild_ocv3416.yml

-name: CMake auto build on OpenCV 3.4.16
+name: CMake manual build on OpenCV 3.4.16
 
 on: workflow_call
 

.github/workflows/cmake_manualbuild_ocv347.yml

-name: CMake auto build on OpenCV 3.4.7
+name: CMake manual build on OpenCV 3.4.7
 
 on: workflow_call
 

.github/workflows/cmake_manualbuild_ocv460.yml

-name: CMake auto build on OpenCV 4.6.0
+name: CMake manual build on OpenCV 4.6.0
 
 on: workflow_call