update changelog

Author: myk002

changelog.txt

@@ -28,6 +28,16 @@ Template for new versions:
 
 ## New Tools
 
+## New Features
+
+## Fixes
+
+## Misc Improvements
+
+## Removed
+
+# 51.09-r1
+
 ## New Features
 - `gui/mass-remove`: add a button to the bottom toolbar when eraser mode is active for launching `gui/mass-remove`
 - `idle-crafting`: default to only considering happy and ecstatic units for the highest need threshold
@@ -37,10 +47,6 @@ Template for new versions:
 - `idle-crafting`: check that units still have crafting needs before creating a job for them
 - `gui/journal`: prevent pause/unpause events from leaking through the UI when keys are mashed
 
-## Misc Improvements
-
-## Removed
-
 # 51.07-r1
 
 ## New Tools