PC-Sampling doc updates - FW version (#455)

* Initial doc update

* addressed review comments

* addressed review comments - 2

* accept reviewer suggestions

Co-authored-by: Rawat, Swati <Swati.Rawat@amd.com>

* accept reviewer suggestions-2

Co-authored-by: Rawat, Swati <Swati.Rawat@amd.com>

* accept reviewer suggestions-3

Co-authored-by: Rawat, Swati <Swati.Rawat@amd.com>

* accept reviewer suggestions-4

Co-authored-by: Rawat, Swati <Swati.Rawat@amd.com>

* Update README.md

Co-authored-by: Rawat, Swati <Swati.Rawat@amd.com>

* Update CHANGELOG.md as per viewer suggestions

Co-authored-by: Rawat, Swati <Swati.Rawat@amd.com>

* accept review suggestion

Co-authored-by: Indic, Vladimir <Vladimir.Indic@amd.com>

* accept reviewer suggestion

Co-authored-by: Rawat, Swati <Swati.Rawat@amd.com>

* accept reviewer suggestions

Co-authored-by: Rawat, Swati <Swati.Rawat@amd.com>

---------

Co-authored-by: Rawat, Swati <Swati.Rawat@amd.com>
Co-authored-by: Indic, Vladimir <Vladimir.Indic@amd.com>
Co-authored-by: Bhardwaj, Gopesh <Gopesh.Bhardwaj@amd.com>

README.md

@@ -97,7 +97,7 @@ Please report issues on GitHub OR send an email to <dl.ROCm-Profiler.support@amd
 
   - Timestamps in PC sampling records might not be 100% accurate.
 
-  - Using PC sampling on multi-threaded applications might fail with `HSA_STATUS_ERROR_EXCEPTION`.Furthermore, if three or more threads launch operations to the same agent, and if PC sampling is enabled, the `HSA_STATUS_ERROR_EXCEPTION` might appear.
+  - For low PC-sampling frequencies with intervals < 65k cycles, a lot of error samples might be delivered. We're working on optimizing this to allow lower sampling frequencies.
 
 - gfx10, gfx11 and gfx12 requires a stable power state for counter collection. This includes Radeon 7000 GPUs.
   ```bash
@@ -126,5 +126,8 @@ Please report issues on GitHub OR send an email to <dl.ROCm-Profiler.support@amd
           TARGET_GRAPHICS_VERSION: gfx1102
   ```
 
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 > [!WARNING]
 > The latest mainline version of AQLprofile can be found at [https://repo.radeon.com/rocm/misc/aqlprofile/](https://repo.radeon.com/rocm/misc/aqlprofile/). However, it's important to note that updates to the public AQLProfile may not occur as frequently as updates to the rocprofiler-sdk. This discrepancy could lead to a potential mismatch between the AQLprofile binary and the rocprofiler-sdk source.