Add experimental SM 6.10 LinAlg validation notes (#8588, #8608)

Since this PR targets main, include the SM 6.10 experimental LinAlg
validation changes merged since #8607: parameter/K-dimension validation
(#8588) and restricting allowed matrix component types (#8608). The
release branch caps SM to 6.9 and strips these separately.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 086148ba-a82b-41c4-8fa0-5eb63e5797e2

Author: alsepkow

docs/ReleaseNotes.md

@@ -119,6 +119,10 @@ first shipped in the 1.10.2605 preview.
   [#8271](https://github.com/microsoft/DirectXShaderCompiler/issues/8271).
 - Corrected the parameter order of `InterlockedAccumulate`
   [#8459](https://github.com/microsoft/DirectXShaderCompiler/pull/8459).
+- Added validation of LinAlg matrix builtin parameters and result K dimension
+  [#8588](https://github.com/microsoft/DirectXShaderCompiler/pull/8588).
+- Restricted the component types allowed in LinAlg matrices
+  [#8608](https://github.com/microsoft/DirectXShaderCompiler/pull/8608).
 
 ### Version 1.10.2605