[clang] [Doc] Update documentation for no-transitive-change (PR #96453)

[Ilya Biryukov via cfe-commits]

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@@ -229,6 +229,10 @@ C++20 Feature Support
   will now work.
   (#GH62925).
 
+- Clang refactored the BMI format to make it possible to support no transitive changes
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ilya-biryukov wrote:

> Good suggestions. Applied. (Just change should to can. Since I feel should read like users can get this benefit directly. But it is not the case. They need helps from build systems).

Yeah, makse sense, "can" fits better here, we also want some follow up from the build system vendors.

> And I put this into the What's New in Clang |release|? section, which is highest except the Potentially Breaking Change section.

This seems very reasonable, I am not sure this is a "potentially breaking change" even. It does change the BMI, but that's expected with every new version of the compiler.

https://github.com/llvm/llvm-project/pull/96453