fix: heading order on gen1/prev subscribe-data page (#7790)

Author: hbuchel

src/fragments/lib-v1/graphqlapi/flutter/subscribe-data.mdx

@@ -76,7 +76,7 @@ Amplify.Hub.listen(
 );
 ```
 
-#### SubscriptionStatus
+### SubscriptionStatus
 
 - **`connected`** - Connected and working with no issues
 - **`connecting`** - Attempting to connect (both initial connection and reconnection)

src/fragments/lib-v1/graphqlapi/ios/subscribe-data.mdx

@@ -82,9 +82,9 @@ func createSubscription() {
 
 </BlockSwitcher>
 
-### Unsubscribing from updates
+## Unsubscribing from updates
 
-#### Listener (iOS 11+)
+### Listener (iOS 11+)
 
 To unsubscribe from updates, you can call `cancel()` on the subscription
 
@@ -95,7 +95,7 @@ func cancelSubscription() {
 }
 ```
 
-#### Combine (iOS 13+)
+### Combine (iOS 13+)
 
 With the Combine flavor of the `subscribe()` API, you have the option of canceling just the downstream Combine subscriber, or the entire GraphQL subscription.
 

src/fragments/lib/graphqlapi/flutter/subscribe-data.mdx

@@ -76,7 +76,7 @@ Amplify.Hub.listen(
 );
 ```
 
-#### SubscriptionStatus
+### SubscriptionStatus
 
 - **`connected`** - Connected and working with no issues
 - **`connecting`** - Attempting to connect (both initial connection and reconnection)

src/fragments/lib/graphqlapi/ios/subscribe-data.mdx

@@ -87,9 +87,9 @@ func createSubscription() {
 
 </BlockSwitcher>
 
-### Unsubscribing from updates
+## Unsubscribing from updates
 
-#### Async/Await
+### Async/Await
 
 To unsubscribe from updates, you can call `cancel()` on the subscription.
 
@@ -100,7 +100,7 @@ func cancelSubscription() {
 }
 ```
 
-#### Combine
+### Combine
 
 Calling `cancel()` on the sequence will disconnect the subscription from the backend. Any downstream subscribers will also be cancelled.