Fix typos discovered by codespell (#6718)

> codespell --skip="*.json,*.rtf" \

--ignore-words-list=crate,delet,inout,iterm,jumo,lightening,othe,ser,tabe,te,tese,thi,updat
* https://github.com/codespell-project/codespell/blob/master/README.rst

Release Notes:

- N/A

crates/language/src/language.rs

@@ -586,7 +586,7 @@ impl<'de> Deserialize<'de> for BracketPairConfig {
 }
 
 /// Describes a single bracket pair and how an editor should react to e.g. inserting
-/// an opening bracket or to a newline character insertion inbetween `start` and `end` characters.
+/// an opening bracket or to a newline character insertion in between `start` and `end` characters.
 #[derive(Clone, Debug, Default, Deserialize, PartialEq)]
 pub struct BracketPair {
     /// Starting substring for a bracket.