Fix edubuntu build: ubuntu-minimal is not a task and minimal is already declared.

debian/changelog

@@ -1,6 +1,8 @@
 livecd-rootfs (2.803) UNRELEASED; urgency=medium
 
   * Fix wrong task name for xubuntu-minimal.
+  * Fix edubuntu build: ubuntu-minimal is not a task and minimal is already
+    declared.
 
  -- Steve Langasek <steve.langasek@ubuntu.com>  Fri, 24 Feb 2023 20:56:48 -0800
 

live-build/auto/config

@@ -776,7 +776,7 @@ case $PROJECT in
 		;;
 
 	edubuntu)
-		add_task install minimal standard ubuntu-minimal edubuntu-desktop-gnome
+		add_task install minimal standard edubuntu-desktop-gnome
 		LIVE_TASK='edubuntu-live'
 		;;