chore(deps): update dependency provider to notification.toolkit.fluxc…

…d.io/v1beta3

| datasource     | package  | from                                   | to                                     |
| -------------- | -------- | -------------------------------------- | -------------------------------------- |
| kubernetes-api | Provider | notification.toolkit.fluxcd.io/v1beta2 | notification.toolkit.fluxcd.io/v1beta3 |

kubernetes/main/apps/flux-system/add-ons/notification/discord.yaml

@@ -1,6 +1,6 @@
 ---
 # yaml-language-server: $schema=https://kubernetes-schemas.zinn.ca/notification.toolkit.fluxcd.io/provider_v1beta2.json
-apiVersion: notification.toolkit.fluxcd.io/v1beta2
+apiVersion: notification.toolkit.fluxcd.io/v1beta3
 kind: Provider
 metadata:
   name: discord