add release note

Author: Backl1ght

clang/docs/ReleaseNotes.rst

@@ -695,6 +695,7 @@ Bug Fixes in This Version
 - Fixed type mismatch error when 'builtin-elementwise-math' arguments have different qualifiers, this should be well-formed. (#GH141397)
 - Constant evaluation now correctly runs the destructor of a variable declared in
   the second clause of a C-style ``for`` loop. (#GH139818)
+- Fixed an infinite recursion about defaulted constexpr dtor. (#GH141789)
 
 Bug Fixes to Compiler Builtins
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