Update renovate.json

add workaround from renovatebot/renovate#8231 to bump version in Chart.yaml, when image tag gets updated

renovate.json

@@ -2,5 +2,30 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": ["config:base", ":disableDependencyDashboard"],
   "bumpVersion": "patch",
-  "additionalBranchPrefix": "{{parentDir}}-"
+  "additionalBranchPrefix": "{{parentDir}}-",
+  "packageRules": [
+    {
+      "matchManagers": [
+        "helm-requirements",
+        "helm-values",
+      ],
+      "postUpgradeTasks": {
+        "commands": [
+          `version=$(grep '^version:' {{{parentDir}}}/Chart.yaml | awk '{print $2}')
+          major=$(echo $version | cut -d. -f1)
+          minor=$(echo $version | cut -d. -f2)
+          patch=$(echo $version | cut -d. -f3)
+          minor=$(expr $minor + 1)
+          echo "Replacing $version with $major.$minor.$patch"
+          sed -i "s/^version:.*/version: $\{major\}.$\{minor\}.$\{patch\}/g" {{{parentDir}}}/Chart.yaml
+          cat {{{parentDir}}}/Chart.yaml
+          `
+        ],
+        "fileFilters": [
+          "**/Chart.yaml",
+        ],
+        "executionMode": "branch",
+      },
+    },
+  ]
 }