Update boost_1_91_0.adoc

release-notes/boost_1_91_0.adoc

@@ -32,6 +32,10 @@ boost_at:/doc/libs/1_91_0/[Documentation]
 // ** Conform to `std::pointer_traits` requirements (boost_gh:pr[interprocess,32]).
 // ** Fixed `named_condition_any` fails to notify (boost_gh:issue[interprocess,62]).
 
+* boost_phrase:library[any,/libs/any/]:
+** Fix `import std` detection in CMake.
+** Simplified implmentation of `boost::anys::basic_any`.
+
 * boost_phrase:library[Core,/libs/core/]:
 ** The header `boost/is_placeholder.hpp` has been moved from Bind to Core. (https://github.com/boostorg/core/issues/90[#90])
 
@@ -55,6 +59,9 @@ boost_at:/doc/libs/1_91_0/[Documentation]
 ** Implementation quality improvements (e.g. more precise use of `noexcept`).
 ** Removed the deprecated `verbose_diagnostic_info` (replaced by `diagnostic_details`).
 
+* boost_phrase:library[LexicalCast,/libs/lexical_cast/]:
+** Implemented initial version of C++20 module `boost.lexical_cast`.
+
 * boost_phrase:library[MultiIndex,/libs/multi_index/]:
 ** *Breaking change:* All type lists accepted or provided by the library (`indexed_by`,
 `tag`, nested typedefs `index_specifier_type_list`, `index_type_list`, `iterator_type_list`
@@ -140,6 +147,21 @@ This addresses issues https://github.com/boostorg/optional/issues/132[#132] and
       serialize_as_value(v);
   }
 
+
+* boost_phrase:library[PFR,/libs/pfr/]:
+** Added experimental C++26 Reflection based implementation. Define `BOOST_PFR_USE_CPP26_REFLECTION`
+   macro to `1` to enable.
+** `boost::pfr::for_each_field*()` functions now work well with stateful visitors.
+
+* boost_phrase:library[Stacktrace,/libs/stacktrace/]:
+** The library now does not check at compile time for a possibly incompatible runtime. As a result
+   the check now does not have false positives and the `from_exception` functionality
+   just works out-of-the-box. Rare cases of incompatible/leaking runtimes are now reported at runtime.
+** Disable `from_exception` on cygwin (boost_gh:pr[stacktrace,219]). Many thanks to David McFarland
+   for the PR!
+** Simplified `has_addr2line` check to not link with C++ Standard Library to simplify builds with
+   non system-default libstdc++.so
+
 * boost_phrase:library[System,/libs/system/]:
 ** The return type of `operator|(result<T&>, U)` has been changed to non-reference.
 ** Pointers to members in `r & f` are now supported (by using `boost::compat::invoke`).
@@ -152,6 +174,11 @@ This addresses issues https://github.com/boostorg/optional/issues/132[#132] and
    instead of having that as a precondition. The old behavior is now spelled `unsafe_value()`.
 ** Added `boost/system/unwrap_and_invoke.hpp`.
 
+* boost_phrase:library[TypeIndex,/libs/type_index/]:
+** Optimized CTTI type comparisons starting from C++20.
+** `ctti_type_index::name()` now returns pretty value by default in C\+\+14 and more modern C\+\+ standards.
+   Size of binaries that use the library become smaller.
+
 * boost_phrase:library[Unordered,/libs/unordered/]:
 ** Fixed the returned value of range insertion in concurrent containers (boost_gh:pr[unordered,344]).