Update release notes

Author: pol-rivero

.github/github-desktop-plus-release-notes.md

@@ -1,18 +1,20 @@
-GitHub Desktop Plus v3.5.9-beta1
+GitHub Desktop Plus v3.5.9-beta2
 
-Upstream: [GitHub Desktop 3.5.9-beta1 release notes](https://github.com/desktop/desktop/releases/tag/release-3.5.9-beta1)
-
-- The upstream now supports absolute date formats, so we have removed our fork-specific patch for that.  
-  You can find the new date format settings in `File` > `Options` > `Appearance`, including the option "Prefer absolute dates over relative".
+Upstream: [GitHub Desktop 3.5.9-beta2 release notes](https://github.com/desktop/desktop/releases/tag/release-3.5.9-beta2)
 
 ---
 
-## **Fixes:**
+## **Changes and improvements:**
+
+- Added a one-time temporary banner to promote [this discussion](https://github.com/pol-rivero/github-desktop-plus/discussions/140) about a future change to our name and logo.
 
-- [#119] **Windows:** Fetching a repository will no longer hang indefinitely in some situations.
+- [#134] Allow showing a minimap at the right side of the diff view. It shows a small overview of the entire file, which helps to quickly navigate to a specific part of the file. Thank you @kingdo10!  
+  To enable it, click the "Diff options" menu (gear icon at the top right of the diff view) and select "Show minimap".
 
-- [#143] **Linux:** Fix arm64 binary by rebuilding x86_64 native dependencies.
+- [#134] Allow expanding the entire file (not only the changed lines) in the diff view by clicking the "Show whole file" button at the top right of the diff view. This is especially useful when the minimap is enabled. Thank you @kingdo10!
 
-- [#139] Fixed missing padding in the text of some buttons.
+- Improved the speed of some Bitbucket API calls by using the correct page size. This should speed up listing repositories and pull requests when the list is long.
+
+## **Fixes:**
 
-- Performing a merge with conflicts in a linked worktree now displays the conflicts dialog correctly.
+- Fixed loading of Bitbucket repositories (File > Clone repository > Bitbucket tab) by replacing a deprecated (removed) Bitbucket API endpoint.