add graphql conf banner (#5309)

Author: saihaj

README.md

@@ -1,11 +1,14 @@
+<!-- Uncomment guild banner when we remove GraphQL Conf -->
 <!-- Graphql logo readme banner START -->
-<p style="float: right; margin: 0 0 10px 10px;">
+<!-- <p style="float: right; margin: 0 0 10px 10px;">
   <a href="https://the-guild.dev">
     <img src="https://the-guild-org.github.io/press-kit/full-dark-logo.svg" alt="Created by The guild" style="width: 100px;"/>
   </a>
-</p>
+</p> -->
 <!-- Graphql logo readme banner END -->
 
+[![GraphQLConf 2024 Banner: September 10-12, San Francisco. Hosted by the GraphQL Foundation](https://github.com/user-attachments/assets/bdb8cd5d-5186-4ece-b06b-b00a499b7868)](https://graphql.org/conf/2024/?utm_source=github&utm_medium=graphql_hive&utm_campaign=readme)
+
 # GraphQL Hive
 
 GraphQL Hive provides all the tools the get visibility of your GraphQL architecture at all stages,