update changelog for vectorwidth on MFMA sourceSwap
### Added
- Custom Kernel mechanism for adding custom assembly kernels to Tensile
- New assertions for problems sizes, alpha/beta values, and C equals D
-
+- Support setting VectorWidth in M dimension in MFMA SourceSwap configuration
## [Tensile 4.28.0 for ROCm 4.3.0]
### Added
