chore(deps): update ghcr.io/luzifer/ots docker tag to v1.21.0

Author: renovate[bot]

chart/Chart.yaml

@@ -3,7 +3,7 @@ description: A Helm chart for deploying OTS
 name: ots
 version: 1.7.2
 # renovate: datasource=docker depName=ghcr.io/luzifer/ots
-appVersion: '1.20.1'
+appVersion: '1.21.0'
 annotations:
   artifacthub.io/links: |
     - name: Helm Chart

chart/values.yaml

@@ -9,7 +9,7 @@ image:
   pullPolicy: IfNotPresent
   # Overrides the image tag whose default is the chart appVersion.
   # renovate: datasource=docker depName=ghcr.io/luzifer/ots
-  tag: 'v1.20.1'
+  tag: 'v1.21.0'
 
 redis:
   enabled: true