Mention the need to possibly upgrade SDKs

Author: zwarag

app/views/docs/upgrade.phtml

@@ -78,5 +78,9 @@ docker compose exec appwrite migrate</code></pre>
 </div>
 
 <p>The data migration can take longer depending on the amount of data your Appwrite instance contains. The Appwrite migration command uses multi-threading to speed up the process, meaning that adding more CPU cores can help speed up the process.</p>
-
-<p>Once the migration process has completed successfully, you're all set to use the latest version of Appwrite!</p>
+    
+<p>Once the migration process has completed successfully, you're all set to use the latest version of Appwrite!</p>
+    
+<h3><a href="/docs/upgrade#upgrade-sdk" id="upgrade-sdk">Upgrade SDK</a></h3>
+    
+<p>After upgrading the Appwrite server, ensure that the SDKs used by your applications are compatible with the new Appwrite server version.</p>