Update README.md

Change `sytax highlighting` to `syntax highlighting`

Author: mattjared

README.md

@@ -53,7 +53,7 @@ import {Controlled as CodeMirror} from 'react-codemirror2'
 
 - [codemirror](https://www.npmjs.com/package/codemirror)
 
-`codemirror` comes as a [peer dependency](https://nodejs.org/en/blog/npm/peer-dependencies/), meaning you'll need to require it in your project _in addition to_ `react-codemirror2`. This prevents any versioning conflicts that would arise if `codemirror` came as a dependency through this wrapper. It's been observed that version mismatches can cause difficult to trace issues such as sytax highlighting disappearing without any explicit errors/warnings
+`codemirror` comes as a [peer dependency](https://nodejs.org/en/blog/npm/peer-dependencies/), meaning you'll need to require it in your project _in addition to_ `react-codemirror2`. This prevents any versioning conflicts that would arise if `codemirror` came as a dependency through this wrapper. It's been observed that version mismatches can cause difficult to trace issues such as syntax highlighting disappearing without any explicit errors/warnings
 
 - additional