chore(renovate): simplify pre-commit config file pattern

Author: scop

.github/renovate.json

@@ -23,7 +23,7 @@
     {
       "customType": "regex",
       "managerFilePatterns": [
-        "/^\\.pre-commit-config\\.yaml$/"
+        ".pre-commit-config.yaml"
       ],
       "matchStrings": [
         "(?<depName>[\\w-]+)(?<currentValue>==[a-z0-9.]+)"