[clang] [llvm] [RISCV][MC] Support experimental extensions Zvbc32e and Zvkgs (PR #103709)

[Michael Maitland via cfe-commits]

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@@ -302,6 +302,9 @@ The primary goal of experimental support is to assist in the process of ratifica
 ``experimental-zicfilp``, ``experimental-zicfiss``
   LLVM implements the `1.0 release specification <https://github.com/riscv/riscv-cfi/releases/tag/v1.0>`__.
 
+``experimental-zvbc32e``, ``experimental-zvkgs``
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michaelmaitland wrote:

Should we mention these extensions are added in the release notes?

https://github.com/llvm/llvm-project/pull/103709