Migrated to customManagers in Renovate

renovate.json

@@ -34,15 +34,17 @@
   "pin":    { "labels": ["bump/pin"] },
   "digest": { "labels": ["bump/digest"] },
 
-  "regexManagers": [
+  "customManagers": [
     {
+      "customType": "regex",
       "fileMatch": ["^Dockerfile$"],
       "matchStrings": [
         "#\\s*renovate:\\s*datasource=(?<datasource>.*?) depName=(?<depName>.*?)( versioning=(?<versioning>.*?))?\\n(ENV|ARG) .*?_VERSION=(?<currentValue>.*)\\s"
       ],
       "versioningTemplate": "{{#if versioning}}{{{versioning}}}{{else}}semver{{/if}}"
     },
     {
+      "customType": "regex",
       "fileMatch": ["(^|/|\\.)Dockerfile[^/]*$"],
       "matchStrings": [
         "#syntax=(?<depName>.*?):(?<currentValue>.*?)\\n"