docs(nav): fix typos (ionic-team#18948)

Author: rtpHarry

core/src/components/nav/readme.md

@@ -1,7 +1,8 @@
 # ion-nav
 
-Nav is a standalone component for loading arbitrary components and pushing to new components on to the stack.
-Unlike RouterOutlet, Nav is not tied to a particular router. Meaning that if we load a Nav component, and push other components to the stack, they will not affect the apps overall router. This fits use cases where you could have a modal, which needs it's own sub-navigation, but not make it tied to the apps URL.
+Nav is a standalone component for loading arbitrary components and pushing new components on to the stack.
+
+Unlike Router Outlet, Nav is not tied to a particular router. This means that if we load a Nav component, and push other components to the stack, they will not affect the app's overall router. This fits use cases where you could have a modal, which needs its own sub-navigation, without making it tied to the apps URL.
 
 
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