Fix Typo

Summary: Closes #556

Differential Revision: D5102089

Pulled By: emilsjolander

fbshipit-source-id: 340cab34189628318c08ec45fe8c50a5c1970a17

Author: Chiamaka

docs/_docs/flexbox/minmaxdimen.md

@@ -7,7 +7,7 @@ permalink: /docs/min-max-dimen/
 
 Using `MinWidth`, `MinHeight`, `MaxWidth`, and `MaxHeight` gives you increased control over the final size of items in a layout. By mixing these properties with `FlexGrow`, `FlexShrink`, and `AlignItems = Stretch`, you are able to have items with dynamic size within a range which you control.
 
-An example of when `Max` properties can be useful is if you are using `AlignItems = Stretch` but your know that your item won't look good after it increases past a certain point. In this case, your item will stretch to the size of its parent or until it is as big as specified in the `Max` property.
+An example of when `Max` properties can be useful is if you are using `AlignItems = Stretch` but you know that your item won't look good after it increases past a certain point. In this case, your item will stretch to the size of its parent or until it is as big as specified in the `Max` property.
 
 Same goes for the `Min` properties when using `FlexShrink`. For example, you may want children of a container to shrink to fit on one row, but if you specify a minimum width, they will break to the next line after a certain point (if you are using `FlexWrap = Wrap`).