[DOC] CUTLASS 3.3 changelog change request

[manishucsd]

Suggesting a change to the changelog for CUTLASS 3.3

Current ChangeLog

New [Mixed Precision Hopper GEMMs](https://github.com/NVIDIA/cutlass/blob/main/examples/55_hopper_mixed_dtype_gemm) support covering 16-bit x 8-bit input types with optimal performance.
New [Mixed Precision Ampere GEMMs](https://github.com/NVIDIA/cutlass/commit/7d8317a63e0a978a8dbb3c1fb7af4dbe4f286616) with support for canonical layouts (TN) and {fp16, bf16} x {s8/u8}. They also include fast numeric conversion recipes and warp level shuffles to achieve optimal performance.

Suggested change

New [Mixed-Input Hopper GEMMs](https://github.com/NVIDIA/cutlass/blob/main/examples/55_hopper_mixed_dtype_gemm) support covering 16-bit x 8-bit input types with optimal performance.
New [Mixed-Input Ampere GEMMs](https://github.com/NVIDIA/cutlass/pull/1084) with support for canonical layouts (TN) and {fp16, bf16} x {s8/u8}. They also include fast numeric conversion recipes and warp level shuffles to achieve optimal performance.

Summary and rationale for the suggested changes

1. Mixed-Precision to Mixed-Input. Mixed-Precision is taken by the GEMM data-type where inputs (DataType(operandA) == DataType(operandB) are mixed with a different accumulation data type (F16*F16+F32 and BF16*BF16+F32). The code uses cutlass::arch::OpMultiplyAddMixedInputUpcast tag to navigate and communicate that input data types are mixed. It would be good to set a nomenclature that is consistent and distinguishes between Mixed-Precision and Mixed-Input use-case.

2. Update the hyperlink for Mixed Precision Ampere GEMMs to the PR#1084 which has detailed description, steps to only compile Ampere mixed-input GEMMs, reproduce performance results, and a performance graph.

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[mnicely]

We've moved to Mixed "Input"