CHANGELOG.md: Add entry for PR #80

Signed-off-by: Andrew Gunnerson <[email protected]>

CHANGELOG.md

@@ -12,6 +12,7 @@
 * Show notification for OTA cleanup phase following the reboot after an OTA is installed ([PR #78])
 * Fix the initializing OTA updater notification message being shown longer than expected ([PR #78])
 * Fix the pause, resume, and cancel buttons being shown during phases where they cannot work ([PR #78])
+* Show an indeterminate progress bar until the progress reaches 1% because the finalization and cleanup phases don't report any progress ([PR #80])
 
 ### Version 4.8
 
@@ -193,3 +194,4 @@ Changes:
 [PR #73]: https://github.com/chenxiaolong/Custota/pull/73
 [PR #74]: https://github.com/chenxiaolong/Custota/pull/74
 [PR #78]: https://github.com/chenxiaolong/Custota/pull/78
+[PR #80]: https://github.com/chenxiaolong/Custota/pull/80