Fixing Readme.txt

API Spec Documentation link fixed

Change-Id: I0d0ef52eaa0e66b161cb042704c083e29b0db06f

README.md

@@ -85,7 +85,7 @@ To use the rocTX API you need the API header and to link your application with `
 ## Documentation
 
 - API description:
-  - ['roctracer' / 'rocTX' profiling C API specification](docroctracer_spec.md)
+  - ['roctracer' / 'rocTX' profiling C API specification](doc/roctracer_spec.md)
 - Code examples:
   - [test/MatrixTranspose_test/MatrixTranspose.cpp](testMatrixTranspose_test/MatrixTranspose.cpp)
   - [test/MatrixTranspose/MatrixTranspose.cpp](test/MatrixTranspose/MatrixTranspose.cpp)