Rename file

Author: whhender

articles/purview/get-ready.md renamed to articles/purview/account-upgrades.md

@@ -461,8 +461,8 @@ items:
     href: tutorial-using-python-sdk.md
 - name: Reference
   items:
-    - name: Get ready
-      href: get-ready.md
+    - name: Account upgrades
+      href: account-upgrades.md
     - name: Product glossary reference
       href: reference-azure-purview-glossary.md
     - name: Supported browsers