Help: Add 4.1 release note for restored Xcode default deployment target

Help/release/4.1.rst

@@ -243,3 +243,10 @@ Changes made since CMake 4.1.0 include the following.
   each call site.  Previously, it used the value as of the end of the
   directory's ``CMakeLists.txt``, as all other generator expression
   evaluations do.
+
+.. 4.1.3
+
+  * When building for macOS with the :generator:`Xcode` generator,
+    :variable:`CMAKE_OSX_DEPLOYMENT_TARGET` once again defaults to the
+    host's macOS version if it is older than the macOS SDK version,
+    as it did in CMake versions prior to 4.0.