NOBUG: Add upgrade notes

UPGRADING.md

@@ -10,6 +10,17 @@ The format of this change log follows the advice given at [Keep a CHANGELOG](htt
 
 ### core
 
+#### Added
+
+- `\core\output\activity_header` now uses the `is_title_allowed()` method when setting the title in the constructor.
+
+  This method has been improved to give priority to the 'notitle' option in the theme config for the current page layout, over the top-level option in the theme.
+
+  For example, the Boost theme sets `$THEME->activityheaderconfig['notitle'] = true;` by default, but in its `secure` pagelayout, it has `'notitle' = false`.
+  This prevents display of the title in all layouts except `secure`.
+
+  For more information see [MDL-75610](https://tracker.moodle.org/browse/MDL-75610)
+
 #### Changed
 
 - All uses of the following PHPUnit methods have been removed as these methods are
@@ -41,6 +52,14 @@ The format of this change log follows the advice given at [Keep a CHANGELOG](htt
 
   For more information see [MDL-83432](https://tracker.moodle.org/browse/MDL-83432)
 
+### core_form
+
+#### Changed
+
+- The `cohort` form element now accepts new `includes` option, which is passed to the corresponding external service to determine which cohorts to return (self, parents, all)
+
+  For more information see [MDL-83641](https://tracker.moodle.org/browse/MDL-83641)
+
 ### core_reportbuilder
 
 #### Changed

lib/UPGRADING.md

@@ -2,6 +2,17 @@
 
 ## 4.5+
 
+### Added
+
+- `\core\output\activity_header` now uses the `is_title_allowed()` method when setting the title in the constructor.
+
+  This method has been improved to give priority to the 'notitle' option in the theme config for the current page layout, over the top-level option in the theme.
+
+  For example, the Boost theme sets `$THEME->activityheaderconfig['notitle'] = true;` by default, but in its `secure` pagelayout, it has `'notitle' = false`.
+  This prevents display of the title in all layouts except `secure`.
+
+  For more information see [MDL-75610](https://tracker.moodle.org/browse/MDL-75610)
+
 ### Changed
 
 - All uses of the following PHPUnit methods have been removed as these methods are

lib/form/UPGRADING.md

@@ -1,5 +1,13 @@
 # core_form (subsystem) Upgrade notes
 
+## 4.5+
+
+### Changed
+
+- The `cohort` form element now accepts new `includes` option, which is passed to the corresponding external service to determine which cohorts to return (self, parents, all)
+
+  For more information see [MDL-83641](https://tracker.moodle.org/browse/MDL-83641)
+
 ## 4.5
 
 ### Added