Add closing parenthesis (#13712)

I’ve first seen it in the [releases view](https://github.com/facebook/react/releases/tag/v16.5.2) and fixed it there as well.

Author: philipp-spiess

CHANGELOG.md

@@ -12,7 +12,7 @@
 ### React DOM
 
 * Fixed a recent `<iframe>` regression ([@JSteunou](https://github.com/JSteunou) in [#13650](https://github.com/facebook/react/pull/13650))
-* Fix `updateWrapper` so that `<textarea>`s no longer re-render when data is unchanged ([@joelbarbosa](https://github.com/joelbarbosa) in [#13643](https://github.com/facebook/react/pull/13643)
+* Fix `updateWrapper` so that `<textarea>`s no longer re-render when data is unchanged ([@joelbarbosa](https://github.com/joelbarbosa) in [#13643](https://github.com/facebook/react/pull/13643))
 
 ### Schedule (Experimental)