Update third-party examples in book (#898)

* Update third-party.md

* Update third-party.md

Co-authored-by: Christian Legnitto <[email protected]>

Author: robjtede

docs/book/content/servers/third-party.md

@@ -1,6 +1,5 @@
-# Third-Party Integrations
+# Other Examples
 
-There are several examples or third party integration crates that are not
-officially maintained by Juniper developers.
+These examples are not officially maintained by Juniper developers.
 
-- [Actix-Web](https://github.com/actix/examples/tree/master/juniper)
+- [Actix Web](https://github.com/actix/examples/tree/HEAD/graphql/juniper) | [Actix Web (advanced)](https://github.com/actix/examples/tree/HEAD/graphql/juniper-advanced)