Updated docs relnotes to refer to 8233

Author: Pieter Lambrecht

docs/release-notes/version-3.3.md

@@ -6,7 +6,7 @@
 
 * [#8495](https://github.com/netbox-community/netbox/issues/8495) - Enable custom field grouping
 * [#8995](https://github.com/netbox-community/netbox/issues/8995) - Enable arbitrary ordering of REST API results
-* [#8878](https://github.com/netbox-community/netbox/issues/8878) - Restrict API key usage by source IP
+* [#8233](https://github.com/netbox-community/netbox/issues/8233) - Restrict API key usage by source IP
 
 ### REST API Changes