Update release notes

Author: XECDesign

export-noobs/00-release/files/release_notes.txt

@@ -1,5 +1,26 @@
 UNRELEASED:
-  *
+  * PulseAudio now included and running by default
+  * Bluealsa Bluetooth interface removed - Bluetooth audio is now handled by PulseAudio
+  * LXPanel volume control plugin replaced with PulseAudio version
+  * Version 84.0.4147.105 of Chromium web browser included
+  * Version 3.3.0 of Thonny included
+  * Version 32.0.0.453 of Flash player included - note that this will be the final release of Flash, as it is end-of-lifed at the end of 2020
+  * CUPS printer system included, along with system-config-printer CUPS GUI and HP printer drivers
+  * raspi-config menu structure rearranged to match Raspberry Pi Configuration tabs
+  * Control for GPIO-connected fans added to raspi-config and Raspberry Pi Configuration
+  * Control for power / activity LED on Pi 400 and Pi Zero added to raspi-config and Raspberry Pi Configuration
+  * Improved screen reader voice prompts in several applications
+  * Added ctrl-alt-space shortcut to install Orca screen reader at any point
+  * Low voltage warnings added to battery monitor plugin
+  * Magnifier plugin zoom can now be changed with scroll wheel when pointer is over icon
+  * Change to notification popups - now will only close when clicked on directly, not by clicking anywhere
+  * Bookshelf now made compatible with translated versions of books and magazines, and will offer translated versions where available, based on system language setting
+  * Bug fix - crash in CPU temperature plugin when throttling detection fails
+  * Bug fix - if Orca is running, shutdown commands and shutdown dialog will force kill it to prevent it locking up the reboot or shutdown process
+  * Various additional language translations added
+  * Various minor bug fixes and UI tweaks
+  * Raspberry Pi firmware b324aea801f669b6ab18441f970e74a5a7346684
+  * Linux kernel 5.4.79
 2020-08-20:
   * raspi-config - added selection of boot device order
   * raspi-config - added selection of boot EEPROM version