Update roctracer_spec.md

[ROCm/roctracer commit: fc7826533c]

projects/roctracer/doc/roctracer_spec.md

@@ -1,7 +1,7 @@
 # ROC Tracer / ROC-TX Libraries Specification
 ```
 ROC Tracer API version 2
-ROCTX API version 1
+ROC-TX API version 1
 
 - The rocTracer API is agnostic to specific runtime and may trace
 the runtime API calls and asynchronous GPU activity.