Use the dedicated subdomain for the bug report URL by default

[benbz]

Type of change

• Feature
• Bugfix
• Technical
• Other :

Content

The default bug report URL should be the dedicated subdomain (on element.io not riot.im!!!).

Motivation and context

The path routing on element.io/riot.im can be fragile

Screenshots / GIFs

n/a

Tests

Debug logs sent to this URL in another PR and confirmed an issue was created

Tested devices

n/a

Checklist

• Changes has been tested on an Android device or Android emulator with API 21
• UI change has been tested on both light and dark themes
• Accessibility has been taken into account. See https://github.com/element-hq/element-android/blob/develop/CONTRIBUTING.md#accessibility
• Pull request is based on the develop branch
• Pull request includes a new file under ./changelog.d. See https://github.com/element-hq/element-android/blob/develop/CONTRIBUTING.md#changelog
• Pull request includes screenshots or videos if containing UI changes
• Pull request includes a sign off
• You've made a self review of your PR
• If you have modified the screen flow, or added new screens to the application, you have updated the test UiAllScreensSanityTest.allScreensTest()