Update changelog and release notes

CHANGELOG.md

@@ -1,5 +1,23 @@
 # Dunst changelog
 
+## 1.9.1 -- 2023-03-08
+
+### Added
+- zsh completion for dunst and dunstctl (#1107 and #1108)
+- dunstctl `history-clear` command to delete all notifications from history (#1131)
+- dunstctl `history-rm command` to remove a single notification from history (#1128)
+- `progress_bar_corner_radius` option for adding rounded corners to the progress bar (off by default) (#1119)
+- `icon_corner_radius` option for adding rounded corners to notification icons (#1139)
+
+### Changed
+- Make libnotify and dunstify optional in build (#1129)
+
+### Fixed
+- Man page typo's and readability (#1088 and #1121)
+- Length changes not being emitted over D-Bus (#1127)
+- Crash when locking screen with swaylock on Sway (#1148)
+- Dunst using 100% in some configurations with `idle_threshold` turned on (#1140)
+
 ## 1.9.0 -- 2022-06-27
 
 ### Added

RELEASE_NOTES

@@ -1,3 +1,15 @@
+===================================================================================
+Release Notes For v1.9.1
+===================================================================================
+
+If you like rounded corners, this release is for you. You can now add rounded
+corners to your progress bar and notification icons. Dunstctl added more
+options for changing the notification history, so I'm excited for what you can
+build with that. Dunst also is even more stable now with a crash being fixed
+and not using 100% of your cpu anymore in some situations.
+
+Take a look at the changelog for a more detailed change description.
+
 ===================================================================================
 Release Notes For v1.9.0
 ===================================================================================