feat: update changelog

docs/pages/about/changelog/beta-2024-12.md

@@ -33,6 +33,10 @@
 - Overall improvements to the extensions page.
 - No longer use CLI commands to place and remove extension buttons on/from the extensions page, instead, we're using the newly released `extensions()` API.
 - Version checking has been sped up and will now cache the latest release name in the background, once a day.
+- Add a progress bar to `-upgrade`, `-rerun-install`, `-install` and `-remove`.
+- New error notice on unfinished Blueprint installs.
+- Add Blueprint to the Pterodactyl copyright notice, with an optional flag to disable it.
+- Add `show_in_sidebar` flag to optionally add the "Extensions" button to the admin panel's sidebar.
 
 <br/>
 
@@ -58,4 +62,4 @@
 - [BlueprintExtensionLibrary](?page=documentation/$blueprint)'s `notifyNow()` and `notifyAfter()` have been deprecated.
 - [`export.sh`](?page=documentation/scripts)'s `$BLUEPRINT_EXPORT_DIRECTORY` environment variable has been deprecated in favor of `$BLUEPRINT_TMP`.
 - `dbSet()` with a number will now also return numbers on `dbGet()` whereas before it always returned strings.
-- Blueprint's admin page has been removed and replaced with a modal on the extensions page. Developer and telemetry settings do not migrate over during upgrade.
+- Blueprint's admin page has been removed and replaced with a modal on the extensions page. Developer and telemetry settings do not migrate over during upgrade.