update kibana constraint

Before version 8.3.0 a bug in the Fleet UI configuration conflict resolution screen would prevent a successful update of this package to the new version. The constraint is updated on Kibana >= 8.3 where the related fix landed[1] so we can guarantee a working upgrade path. [1]: elastic/kibana#132068

Author: endorama

packages/gcp/manifest.yml

@@ -15,7 +15,7 @@ categories:
  - google_cloud
  - cloud
 conditions:
- kibana.version: ^7.17.0 || ^8.0.0
+ kibana.version: ^7.17.0 || ^8.3.0
 screenshots:
  - src: /img/filebeat-gcp-audit.png
  title: filebeat gcp audit