feat(container)!: Update image docker.io/syncthing/syncthing ( 1.30.0 ➔ 2.0.15 )

| datasource | package                       | from   | to     |
| ---------- | ----------------------------- | ------ | ------ |
| docker     | docker.io/syncthing/syncthing | 1.30.0 | 2.0.15 |

Author: mortyops[bot]

kubernetes/apps/selfhosted/syncthing/app/helmrelease.yaml

@@ -23,7 +23,7 @@ spec:
           app:
             image:
               repository: docker.io/syncthing/syncthing
-              tag: 1.30.0
+              tag: 2.0.15
             env:
               TZ: America/New_York
               # Syncthing home directory for config/keys