fix(CI): add file match to custom manager

Author: meysam81

renovate.json

@@ -4,6 +4,9 @@
     {
       "customType": "regex",
       "datasourceTemplate": "{{#if (equals datasource 'github')}}github-tags{{else}}{{{datasource}}}{{/if}}",
+      "fileMatch": [
+        "^.*$"
+      ],
       "matchStrings": [
         "\\s*#\\s?renovate: (?<datasource>.*?)=(?<depName>.*?)(\\s+versioning=(?<versioning>.*?))?\\s+[\\w+\\.\\-]+(?:[:=]|\\s+\\S+)\\s*[\\\"']?(?<currentValue>[\\w+\\.\\-]*)(?:@(?<currentDigest>sha256:[a-f0-9]+))?[\\\"']?"
       ],