The extension does not activate when language mode is Django HTML in HTML files

[ahmedsaoudi]

Describe the bug
In .html pages, the extension doesn't activate automatically when the language mode is set to Django HTML.

To Reproduce
Steps to reproduce the behavior:

1. Open command palette and type "Change language mode"
2. Choose "Django HTML"
3. Open an .html file prepopulated with HTML code
4. HTML end-tag labels aren't visible.

Expected behavior
HTML end-tag labels visible when opening an HTML file.

Screenshots

Desktop (please complete the following information):

• OS: Ubuntu 20.04
• VSCode Version: 1.87
• Extension Version: 1.0.0

Additional context