Updated React Native 2.0 Migration Guide language to say upgrade instead

Author: stayseesong

src/_data/sidenav/strat.yml

@@ -33,7 +33,7 @@ sections:
   - path: /connections/destinations/catalog/facebook-pixel
     title: Facebook Pixel destination
   - path: /connections/destinations/catalog/actions-facebook-conversions-api
-    title: Facebook Conversions API (Actions) destination 
+    title: Facebook Conversions API (Actions) destination
   - path: /connections/destinations/catalog/facebook-app-events
     title: Facebook App Events destination
   - path: /connections/destinations/catalog/facebook-offline-conversions
@@ -73,7 +73,7 @@ sections:
     title: Google Ads Remarketing Lists destination (Personas)
   - path: /connections/destinations/catalog/personas-display-video-360
     title: Google Display & Video 360 destination (Personas)
-   
+
 
 - slug: salesforce
   section_title: Salesforce Integrations
@@ -160,7 +160,7 @@ sections:
   - path: /connections/sources/catalog/libraries/mobile/react-native
     title: Analytics-React-Native mobile source
   - path: /connections/sources/catalog/libraries/mobile/react-native/migration
-    title: React-Native 2.0 Migration Guide
+    title: Upgrade to React-Native 2.0
   - path: /connections/sources/catalog/libraries/mobile/react-native/troubleshooting
     title: Troubleshooting Analytics-React-Native
   - path: /connections/sources/catalog/libraries/mobile/react-native/react-faqs/

src/connections/sources/catalog/libraries/mobile/react-native/migration.md

@@ -1,11 +1,11 @@
 ---
-title: React Native 2.0 Migration Guide
+title: Upgrade to React Native 2.0
 strat: react-native
 ---
 
-If you're using `analytics-react-native 1.5.1` or older, follow these steps to migrate to `analytics-react-native 2.0`. You can continue to use your React Native source write key for the migration to view historical events. Additionally, with React Native 2.0, you don't need to leverage bundled SDK packages, but can use [this list of supported destinations](/docs/connections/sources/catalog/libraries/mobile/react-native#supported-destinations).
+If you're using `analytics-react-native 1.5.1` or older, follow these steps to upgrade to `analytics-react-native 2.0`. You can continue to use your React Native source write key for the upgrade to view historical events. Additionally, with React Native 2.0, you don't need to leverage bundled SDK packages, but can use [this list of supported destinations](/docs/connections/sources/catalog/libraries/mobile/react-native#supported-destinations).
 
-To migrate to React Native 2.0:
+To upgrade to React Native 2.0:
 
 1. Update the existing package:
     ```js