Fix typo

Author: weswigham

pages/release notes/TypeScript 2.8.md

@@ -377,7 +377,7 @@ app.C = class { };
 
 # Per-file JSX factories
 
-TypeScript 2.8 adds support for a per-file configurable JSX factory name using `@jsx dom` paragma.
+TypeScript 2.8 adds support for a per-file configurable JSX factory name using `@jsx dom` pragma.
 JSX factory can be configured for a compilation using `--jsxFactory` (default is `React.createElement`). With TypeScript 2.8 you can override this on a per-file-basis by adding a comment to the beginning of the file.
 
 ##### Example