Add summary release notes for v3.4

docs/release-notes/index.md

@@ -10,6 +10,16 @@ Minor releases are published in April, August, and December of each calendar yea
 
 This page contains a history of all major and minor releases since NetBox v2.0. For more detail on a specific patch release, please see the release notes page for that specific minor release.
 
+#### [Version 3.4](./version-3.4.md) (December 2022)
+
+* New Global Search ([#10560](https://github.com/netbox-community/netbox/issues/10560))
+* Virtual Device Contexts ([#7854](https://github.com/netbox-community/netbox/issues/7854))
+* Saved Filters ([#9623](https://github.com/netbox-community/netbox/issues/9623))
+* JSON/YAML Bulk Imports ([#4347](https://github.com/netbox-community/netbox/issues/4347))
+* Update Existing Objects via Bulk Import ([#7961](https://github.com/netbox-community/netbox/issues/7961))
+* Scheduled Reports & Scripts ([#8366](https://github.com/netbox-community/netbox/issues/8366))
+* API for Staged Changes ([#10851](https://github.com/netbox-community/netbox/issues/10851))
+
 #### [Version 3.3](./version-3.3.md) (August 2022)
 
 * Multi-object Cable Terminations ([#9102](https://github.com/netbox-community/netbox/issues/9102))