feat: update renovate to recognize Chart.yaml's appVersion

k8s/charts/miniflux/Chart.yaml

@@ -4,3 +4,7 @@ description: A Helm chart for Miniflux RSS reader
 type: application
 version: 0.1.0
 appVersion: 2.3.3
+annotations:
+  artifacthub.io/images: |
+    - name: miniflux
+      image: miniflux/miniflux:2.3.3

k8s/charts/oxicloud/Chart.yaml

@@ -7,3 +7,7 @@ description: 'Ultra-fast, secure & lightweight self-hosted cloud storage — you
 type: application
 version: 0.1.0
 appVersion: 0.8.6
+annotations:
+  artifacthub.io/images: |
+    - name: oxicloud
+      image: diocrafts/oxicloud:0.8.6

k8s/charts/vaultwarden/Chart.yaml

@@ -4,3 +4,7 @@ description: A Helm chart for Vaultwarden password manager
 type: application
 version: 0.1.0
 appVersion: 1.37.1
+annotations:
+  artifacthub.io/images: |
+    - name: vaultwarden
+      image: vaultwarden/server:1.37.1-alpine

renovate.json

@@ -1,3 +1,12 @@
 {
-  "$schema": "https://docs.renovatebot.com/renovate-schema.json"
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommendedForSelfHosted"
+  ],
+  "helmv3": {
+    "enabled": true,
+    "fileMatch": [
+      "Chart\\.yaml$"
+    ]
+  }
 }