added 1824758 to disco known bugs

posts/release/disco/final/post.md

@@ -7,6 +7,7 @@ Installer
  * apparently unexpected order in language selection on welcome module ([1801498](https://bugs.launchpad.net/calamares/+bug/1801498))
  * Lubuntu doesn't have a "minimal install" option in the installer; workaround available ([1769473](https://bugs.launchpad.net/ubuntu/+source/calamares-settings-ubuntu/+bug/1769473))
  * no clear indication that format has been selected ([1773610](https://bugs.launchpad.net/calamares/+bug/1773610)
+ * summary window expands, cutting off buttons with 800x600 screen ([1824758](https://bugs.launchpad.net/calamares/+bug/1824758)
 
 Desktop Environment
 -------------------