[config]: Update chromatic.yml

We couldn't create a comparison just yet. We need a successful build on both the source and the target branch in order to generate one. Here's what you should do:

1. Checkout main

   git checkout main

   Don't forget to install or update dependencies after switching branches.
2. Create a build on main

   npx chromatic --project-token=306470cd2876

3. Merge main into yjkwon07-patch-1

   git checkout yjkwon07-patch-1

   You may have to run git pull to update your local branch after switching.

   git merge main

   Don't forget to install or update dependencies after merging branches.
4. Finally, run a build for yjkwon07-patch-1

   npx chromatic --project-token=306470cd2876 

   Not sure how to create a build? Learn how to publish your Storybook