Fixed grammar in the docs.

Author: Lastique

doc/changelog.qbk

@@ -12,9 +12,9 @@
 [heading 2.30, Boost 1.87]
 
 * Replaced __boost_thread__ synchronization primitives with equivalents from the C++ standard library. This may improve multithreaded performance, but also has user-facing consequences:
-  * __boost_thread__ thread interruption is no longer supported. Boost.Log no longer has special treatment for the `thread_interrupted` exception that is used by Boost.Thread to implement thread interruption. This exception will be handled like any other exception.
+  * __boost_thread__ thread interruption is no longer supported. Boost.Log no longer has special treatment for the `thread_interrupted` exception that is used by __boost_thread__ to implement thread interruption. This exception will be handled like any other exception.
     In particular, user-specified exception handlers may now be invoked with the `thread_interrupted` pending exception.
-  * For timed waiting operations, timeouts are now using std::chrono time units. This means that the `ordering_window` named parameter that is supported by the [class_sinks_bounded_ordering_queue] and [class_sinks_unbounded_ordering_queue] now expects an `std::chrono::duration` value instead of `boost::posix_time::time_duration` from __boost_date_time__.
+  * For timed waiting operations, timeouts are now using std::chrono time units. This means that the `ordering_window` named parameter that is supported by the [class_sinks_bounded_ordering_queue] and [class_sinks_unbounded_ordering_queue] classes now expects an `std::chrono::duration` value instead of `boost::posix_time::time_duration` from __boost_date_time__.
   * In case of errors indicated by thread synchronization primitives, `std::system_error` exception is thrown instead of __boost_thread__ exception types.
 * Added support for C++ standard library lock types to [class_log_strictest_lock].