Update docs/how-to/hip_runtime_api/call_stack.rst

Co-authored-by: MKKnorr <[email protected]>

docs/how-to/hip_runtime_api/call_stack.rst

@@ -20,7 +20,7 @@ the call stack increases due to the parallelism inherent to the GPUs. NVIDIA
 and AMD GPUs use different approaches. NVIDIA GPUs have the independent thread
 scheduling feature where each thread has its own call stack and effective
 program counter. On AMD GPUs threads are grouped; each warp has its own call
-stack and program counter, but not each thread. Warps are described and 
+stack and program counter. Warps are described and 
 explained in the :ref:`inherent_thread_hierarchy`.
 
 If a thread or warp exceeds its stack size, a stack overflow occurs, causing