Migrate Renovate config

[renovate]

The Renovate config in this repository needs migrating. Typically this is because one or more configuration options you are using have been renamed.

You don't need to merge this PR right away, because Renovate will continue to migrate these fields internally each time it runs. But later some of these fields may be fully deprecated and the migrations removed. So it's a good idea to merge this migration PR soon.

🔕 Ignore: Close this PR and you won't be reminded about config migration again, but one day your current config may no longer be valid.

❓ Got questions? Does something look wrong to you? Please don't hesitate to request help here.

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This PR was generated by Mend Renovate. View the repository job log.

[tommysitu]

@claude look good to you?

[claude]

Claude finished @tommysitu's task in 23s —— View job

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Review: Renovate Config Migration

• Read the PR diff
• Analyze the changes

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Yes, this looks good. The changes are straightforward and correct:

1. fileMatch → managerFilePatterns — This is a renamed config option in Renovate's API. The old fileMatch is deprecated in favor of managerFilePatterns.

2. Regex format change — The pattern strings now use the regex literal syntax with wrapping forward slashes (e.g., "/^\\.circleci/config\\.yml$/" instead of "^\\.circleci/config\\.yml$"). This is the required format for managerFilePatterns.

Both custom regex managers (CircleCI Go image and Markdown docs Go version) are updated consistently. The actual matching logic is unchanged — only the field name and string format are updated.

Safe to merge. ✓