fix: serve the refreshed icon at the old path

[lmjabreu]

Overview

#79 moved the icon to comms-cli_512px.png and deleted icons/comms-cli.png. Every tdc release so far (latest is 3.6.0) sends that old raw GitHub URL as logo_uri when it registers a client, and Todoist stores the URL once and never refreshes it. So every Comms CLI client registered to date, and every new one until a release ships the new LOGO_URI, shows a broken consent-screen icon. This puts the refreshed icon back at the old path (same bytes as comms-cli_512px.png), so all of them show the new icon. The fix: title cuts a release that ships the new LOGO_URI from #79.

icons/comms-cli.png has to stay permanently: clients that stored this URL keep it for good.

Reference

Follows #79.

Changelog

Fix the missing consent-screen icon for clients registered by older versions.

Test plan

1. Open https://raw.githubusercontent.com/doist/comms-cli/main/icons/comms-cli.png on main before this is merged.
   • It returns 404.
2. Open the same URL after this is merged.
   • The refreshed Comms CLI icon loads.
3. Run tdc auth login with an existing config, then again with a fresh config after the release.
   • Both consent screens show the new icon.

Demo

Before	After