1. Go to your project page on CurseForge/WowAce.
2. Click "Edit Project" on the right.
3. Scroll down to the "Summary" box and edit its contents.
If you're using the Curse packager to make ZIPs automatically from a Git or SVN repository, you should leave the box blank, and the packager will automatically update your project's summary to match the "Notes" field in the TOC file from your most recent version.