Update changelog

Author: vitaut

ChangeLog.md

@@ -26,7 +26,8 @@
 
 - Added demangling support (used in exception and `std::type_info` formatters)
   for libc++ and clang-cl
-  (https://github.com/fmtlib/fmt/pull/4560,
+  (https://github.com/fmtlib/fmt/issues/4542,
+  https://github.com/fmtlib/fmt/pull/4560,
   https://github.com/fmtlib/fmt/issues/4568,
   https://github.com/fmtlib/fmt/pull/4571).
   Thanks @FatihBAKIR and @rohitsutreja.
@@ -38,6 +39,12 @@
 - Made the `FMT_USE_CONSTEVAL` macro configurable by users
   (https://github.com/fmtlib/fmt/pull/4546). Thanks @SnapperTT.
 
+- Fixed compilation with locale disabled in the header-only mode
+  (https://github.com/fmtlib/fmt/issues/4550).
+
+- Fixed compilation with clang 21 and `-std=c++20`
+  (https://github.com/fmtlib/fmt/issues/4552).
+
 - Fixed a dynamic linking issue with clang-cl
   (https://github.com/fmtlib/fmt/issues/4576,
   https://github.com/fmtlib/fmt/pull/4584). Thanks @FatihBAKIR.
@@ -55,7 +62,8 @@
   Thanks @LiangHuDream and @teruyamato0731.
 
 - Improved documentation
-  (https://github.com/fmtlib/fmt/pull/4551,
+  (https://github.com/fmtlib/fmt/issues/4549,
+  https://github.com/fmtlib/fmt/pull/4551,
   https://github.com/fmtlib/fmt/issues/4566,
   https://github.com/fmtlib/fmt/pull/4567,
   https://github.com/fmtlib/fmt/pull/4578,).