Fix broken TOC links in MIGRATION_GUIDE (#1048)

* Fix broken TOC link in MIGRATION_GUIDE

* Update MIGRATION_GUIDE.md

MIGRATION_GUIDE.md

@@ -8,17 +8,17 @@ With the v2 release of Auth0-SPA-JS, we have improved both performance and devel
 - [Public API changes](#public-api-changes)
   - [client_id has been renamed to clientId](#client_id-has-been-renamed-to-clientid)
   - [Introduction of authorizationParams](#introduction-of-authorizationparams)
-  - [Introduction of logoutParams](#introduction-of-logoutparameters)
+  - [Introduction of logoutParams](#introduction-of-logoutparams)
   - [buildAuthorizeUrl has been removed](#buildauthorizeurl-has-been-removed)
   - [buildLogoutUrl has been removed](#buildlogouturl-has-been-removed)
   - [localOnly logout has been removed, and replaced by onRedirect](#localonly-logout-has-been-removed-and-replaced-by-onredirect)
   - [redirectMethod has been removed from loginWithRedirect](#redirectmethod-has-been-removed-from-loginwithredirect)
-  - [ignoreCache on getTokenSilentlyhas been replaced by cacheMode](#ignorecache-on-gettokensilentlyhas-been-replaced-by-cachemode)
+  - [ignoreCache on getTokenSilentlyhas been replaced by cacheMode](#ignorecache-on-gettokensilently-has-been-replaced-by-cachemode)
   - [application/x-www-form-urlencoded is used by default instead of application/json](#applicationx-www-form-urlencoded-is-used-by-default-instead-of-applicationjson)
   - [No more iframe fallback by default when using refresh tokens](#no-more-iframe-fallback-by-default-when-using-refresh-tokens)
   - [getUser and getIdTokenClaims](#getuser-and-getidtokenclaims)
   - [Changes to default scopes (profile and email)](#changes-to-default-scopes-profile-and-email)
-    - [defaultScope](#defaultscope)
+    - [advancedOptions and defaultScope are removed](#advancedoptions-and-defaultscope-are-removed)
   - [checkSession no longer throws exceptions](#checksession-no-longer-throws-exceptions)
   - [getIdTokenClaimsOptions type has been removed](#getidtokenclaimsoptions-type-has-been-removed)
 - [Module output](#module-output)