Dev Channel is not updated. Documentation states that it is.

[wispborne]

Steps to Reproduce

1. Navigate to https://github.com/flutter/flutter-intellij/blob/master/docs/Dev-Channel.md in a web browser.
2. Follow the instructions.
3. Note that there is no updated plugin.

Additionally, you may navigate to and download https://plugins.jetbrains.com/plugins/list?channel=dev&pluginId=9212-flutter.
The most recent dev version is 72, over 7 months ago.
The most recent stable version is 80.

Request: Fix dev builds or remove the documentation about dev builds.

[helin24]

This should be fixed after #7610

Let me know if you have any issues with the dev builds from there.