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

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>

extensions/html/languages/html/config.toml

@@ -14,3 +14,6 @@ brackets = [
 ]
 completion_query_characters = ["-"]
 prettier_parser_name = "html"
+
+[overrides.default]
+linked_edit_characters = ["-"]

extensions/html/languages/html/overrides.scm

@@ -1,2 +1,7 @@
 (comment) @comment
 (quoted_attribute_value) @string
+
+[
+  (start_tag)
+  (end_tag)
+] @default