Reorganize items in CHANGELOG.md

Author: ethanjli

software/CHANGELOG.md

@@ -12,8 +12,7 @@ All dates in this file are given in the [UTC time zone](https://en.wikipedia.org
 ### Changed
 
 - (Application: GUI) The ISO selector in the "Optic Configuration" page has been changed from a button group to a slider (with an increment of 50), to enable somewhat finer adjustment of the ISO setting.
-- (Application: GUI) The maximum allowed value in the ISO selector in the "Optic Configuration" page has been reduced from 800 to 650, but only for the planktoscopehat version of the Node-RED dashboard; maximum allowed value is still 800 in the adafruithat version of the Node-RED dashboard. This is because v2024.0.0-alpha.2's change to the scaling factor for converting between ISO settings and camera gains in the picamera2 library has meant that ISO values above 650 would be converted to an image gain value which would be rejected for the Raspberry Pi HQ Camera used PlanktoScopes with hardware version at or agove v2.3.
-- (Breaking change; System) The official SD card images of PlanktoScope OS are now based on the 64-bit (arm64) version of the 2024-03-12 build of Raspberry Pi OS 11 (bullseye), instead of the 32-bit (armhf) version of the 2023-05-03 build of Raspberry Pi OS 11 (bullseye). This increases the performance of the Python segmenter, potentially by a factor of TBD. This is expected to break compatibility with the raspimjpeg-based imaging module. If you need a 32-bit version of PlanktoScope OS, you will need to run the OS setup scripts following the PlanktoScope project's documentation's "Non-standard installation" guide for software setup.
+- (Breaking change; System) The official SD card images of PlanktoScope OS are now based on the 64-bit (arm64) version of the 2024-03-12 build of Raspberry Pi OS 11 (bullseye), instead of the 32-bit (armhf) version of the 2023-05-03 build of Raspberry Pi OS 11 (bullseye). This increases the performance of the Python segmenter, potentially by a factor of 2. This is expected to break compatibility with the raspimjpeg-based imaging module. If you need a 32-bit version of PlanktoScope OS, you will need to run the OS setup scripts following the PlanktoScope project's documentation's "Non-standard installation" guide for software setup.
 - (System: administration) The `machine-name` binary is no longer provided by the OS setup scripts, but instead is provided by Forklift for upgradeability (by upgrading the pallet applied to the Raspberry Pi) & removeability/replaceability (by switching to a different pallet which provides a different version of - or does not provide - the `machine-name`).
 
 ### Deprecated
@@ -27,6 +26,7 @@ All dates in this file are given in the [UTC time zone](https://en.wikipedia.org
 ### Fixed
 
 - (Application: GUI) The landing page's links to offline PDF copies of the protocols.io protocols for PlanktoScope operation are no longer broken.
+- (Application: GUI) The maximum allowed value in the ISO selector in the "Optic Configuration" page has been reduced from 800 to 650, but only for the planktoscopehat version of the Node-RED dashboard; maximum allowed value is still 800 in the adafruithat version of the Node-RED dashboard. This change is because v2024.0.0-alpha.2's change to the scaling factor for converting between ISO settings and camera gains in the picamera2 library has meant that ISO values above 650 were converted to image gain values which were silently rejected for the Raspberry Pi HQ Camera used PlanktoScopes with hardware version at or above v2.3; this, this change prevents users from setting ISO values which would be silently rejected by the Python hardware controller.
 
 ## v2024.0.0-alpha.2 - 2024-04-25