chore(config): migrate renovate config (#426)

chore(config): migrate config renovate.json

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Sahid Velji <[email protected]>
Co-authored-by: Simon Schrottner <[email protected]>

Author: 3 people

renovate.json

@@ -1,17 +1,29 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": ["github>open-feature/community-tooling"],
+  "extends": [
+    "github>open-feature/community-tooling"
+  ],
   "packageRules": [
     {
-      "matchUpdateTypes": ["minor", "patch"],
+      "matchUpdateTypes": [
+        "minor",
+        "patch"
+      ],
       "matchCurrentVersion": "!/^0/",
       "automerge": true
     }
   ],
-  "regexManagers": [
+  "customManagers": [
     {
-      "fileMatch": ["^Makefile$", "^README.md$", "^.github/workflows/pr-checks.yml$"],
-      "matchStrings": ["ghcr\\.io\\/open-feature\\/flagd-testbed:(?<currentValue>.*?)\\n"],
+      "customType": "regex",
+      "managerFilePatterns": [
+        "/^Makefile$/",
+        "/^README.md$/",
+        "/^.github/workflows/pr-checks.yml$/"
+      ],
+      "matchStrings": [
+        "ghcr\\.io\\/open-feature\\/flagd-testbed:(?<currentValue>.*?)\\n"
+      ],
       "depNameTemplate": "open-feature/test-harness",
       "datasourceTemplate": "github-releases"
     }