fix(ci): replace volker.raschek/helm with docker.io/alpine/helm

renovate.json

@@ -31,6 +31,16 @@
       "packageNameTemplate": "https://git.cryptic.systems/volker.raschek/reposilite-charts",
       "datasourceTemplate": "git-tags",
       "versioningTemplate": "semver"
+    },
+    {
+      "customType": "regex",
+      "datasourceTemplate": "github-releases",
+      "managerFilePatterns": [
+        "/.vscode/settings\\.json$/"
+      ],
+      "matchStrings": [
+        "https:\\/\\/raw\\.githubusercontent\\.com\\/(?<depName>[^\\s]+?)\\/(?<currentValue>v[0-9.]+?)\\/schema\\/helm-testsuite\\.json"
+      ]
     }
   ],
   "packageRules": [
@@ -41,6 +51,15 @@
         "volkerraschek/helm"
       ]
     },
+    {
+      "groupName": "Update helm plugin 'unittest'",
+      "matchDepNames": [
+        "helm-unittest/helm-unittest"
+      ],
+      "matchDatasources": [
+        "github-releases"
+      ]
+    },
     {
       "groupName": "Update docker.io/library/node",
       "matchDepNames": [