build(miopen): bump version to 3.6.2 for ROCm 10.2 (#12211)

---

JIRA ID: ALMIOPEN-2636

## Motivation

Routine version bump for the ROCm 10.2 release.

## Technical Details

Bumps MIOpen from 3.6.1 to 3.6.2 in `CMakeLists.txt` and adds the
corresponding entry to `CHANGELOG.md`.

## Risk Assessment

Mechanical version-number change only; no code or behavior affected.

**Risk Level: 🟢 Low**

## Test Plan

None needed — versioning/changelog metadata only.

## Test Result

N/A.

Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>

Author: JonathanLichtnerAMD

projects/miopen/CHANGELOG.md

@@ -3,6 +3,8 @@
 
 Full documentation for MIOpen is available [here](https://rocm.docs.amd.com/projects/MIOpen/en/latest/)
 
+## MIOpen 3.6.2 for ROCm 10.2.0
+
 ## MIOpen 3.6.1 for ROCm 10.1.0
 
 ### Resolved Issues

projects/miopen/CMakeLists.txt

@@ -178,7 +178,7 @@ if(MIOPEN_STRIP_SYMBOLS AND NOT WIN32 AND NOT APPLE)
     set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -s")
 endif()
 
-rocm_setup_version(VERSION 3.6.1)
+rocm_setup_version(VERSION 3.6.2)
 
 include(TargetFlags)