Fix typo and CHANGELOG modification

After meeting with the DevOps team, I've added the Unreleased keyword to new CHANGELOG section per their request

Signed-off-by: coleramos425 <colramos@amd.com>
Signed-off-by: xuchen-amd <xuchen@amd.com>

CHANGELOG.md

@@ -68,7 +68,7 @@ Full documentation for ROCm Compute Profiler is available at [https://rocm.docs.
   * reduced running time of Omniperf when profiling (#384) 
   * console logging improvements
 
-## Omniperf 2.0.1 for ROCm 6.2.0
+## (Unreleased) Omniperf 2.0.1 for ROCm 6.2.0
 
 ### Changes