Update ReleaseNotes about a crash fix (Issue 53628)
Test Plan: none
Differential Revision: https://reviews.llvm.org/D134112
This is the suggested resolution to CWG DR2628.
`Issue 57646 <https://github.com/llvm/llvm-project/issues/57646>`_
`Issue 43829 <https://github.com/llvm/llvm-project/issues/43829>`_
+- Fixed a crash in C++20 mode in Clang and Clangd when compile source
+ with compilation errors.
+ `Issue 53628 <https://github.com/llvm/llvm-project/issues/53628>`_
Improvements to Clang's diagnostics