Update foundation.md

Author: tpetricek

foundation.md

@@ -177,7 +177,7 @@ See the current [list of affiliated technical groups](/technical-groups) and [us
  * Enrico Sada, ([[email protected]](mailto:[email protected])), [@enricosada](https://twitter.com/enricosada)
  * Dmitry Sevastianov, ([[email protected]](mailto:[email protected]))
  * Max Malook, ([mexx](https://github.com/mexx), [@max_malook](https://twitter.com/max_malook))
- * Chris Ballard, [@_ChrisBallard](https://twitter.com/_ChrisBallard)
+ * Chris Ballard, ([@_ChrisBallard](https://twitter.com/_ChrisBallard))
 
 
 ## Contact