chore(renovate): new manager to bump helm in workflows

.github/workflows/release.yaml

@@ -266,7 +266,7 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
       - uses: azure/setup-helm@dda3372f752e03dde6b3237bc9431cdc2f7a02a2 # v5
         with:
-          version: "3.18.0"
+          version: "4.1.4"
       - uses: sigstore/cosign-installer@cad07c2e89fa2edd6e2d7bab4c1aa38e53f76003 # v4
       # Two separate logins because helm and cosign use different auth stores:
       #   - `helm registry login` writes to helm's own config (used by `helm push` below)

renovate.json5

@@ -155,6 +155,18 @@
       depNameTemplate: "goreleaser/goreleaser",
       datasourceTemplate: "github-releases",
     },
+    // Helm version pinned inside the `with: version:` field of
+    // azure/setup-helm in release.yaml (same blind spot as goreleaser above).
+    {
+      customType: "regex",
+      managerFilePatterns: ["/^\\.github/workflows/release\\.ya?ml$/"],
+      matchStrings: [
+        "setup-helm[^\\n]+\\n\\s+with:\\n\\s+version:\\s*\"(?<currentValue>\\d[\\w.-]*)\"",
+      ],
+      depNameTemplate: "helm/helm",
+      datasourceTemplate: "github-releases",
+      extractVersionTemplate: "^v(?<version>.*)$",
+    },
   ],
 
   packageRules: [