fix(aerc): make night theme diff colors more readable

[calebdw]

Description

Hello!

This closes #653 by making the diff more readable.

Screenshots

Before

After

Thanks!

[github-actions]

This PR is stale because it has been open 30 days with no activity.

[calebdw]

@folke, can this be merged? Thanks!

[folke]

extras are auto-generated, so I can't merge this.
You need to update the templates instead.

[calebdw]

Ah, I see now---I've update the template and here's how the diff now looks:

[calebdw]

@folke, just pinging you about the update, thanks!

[github-actions]

This PR is stale because it has been open 30 days with no activity.

[calebdw]

@folke, does this look good?

[github-actions]

This PR is stale because it has been open 30 days with no activity.

[calebdw]

@folke, just pinging again so the bot won't mark as stale

[archcorsair]

You shouldn't commit the generated ini files since they will get generated during CI. I made the same mistake earlier.

[calebdw]

Thanks for the heads up, but it shouldn't matter because CI will just see that there's no changes

[github-actions]

This PR is stale because it has been open 30 days with no activity.

[calebdw]

@folke, just pinging again so the bot won't mark as stale