extensions: Add `-` as linked edit character for HTML (#43179)

Smit Barmase and Kunall Banerjee created

Closes https://github.com/zed-industries/zed/issues/43060

Release Notes:

- Fixed issue where typing in custom HTML tag would not complete
subsequent end tag for `-` character.

Co-authored-by: Kunall Banerjee <hey@kimchiii.space>

Change summary

extensions/html/languages/html/config.toml   | 3 +++
extensions/html/languages/html/overrides.scm | 5 +++++
2 files changed, 8 insertions(+)

Detailed changes