Route Dependabot Ruby reviews via CODEOWNERS

[mokagio]

Why

GitHub retired the dependabot.yml reviewers key on 2025-08-08 — Dependabot ignores it and defers to CODEOWNERS. The key was added before we caught the deprecation, so it's currently a no-op.

This adds CODEOWNERS entries routing future Dependabot Ruby PRs to apps-infra-tooling, and removes the dead key. Part of AINFRA-2437.

Note

CODEOWNERS is path-driven, so this also requests apps-infra-tooling on any human PR touching the Ruby tooling files (Gemfile*, .ruby-version, .bundle/, .rubocop*.yml) — intended.

How to test

GitHub validates CODEOWNERS on push; confirm no errors under the repo's CODEOWNERS check.

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Posted by Claude (Opus 4.8) on behalf of @mokagio with approval.

[Copilot]

Pull request overview

This PR updates Dependabot review routing for Ruby-related dependency/tooling changes by migrating from the deprecated dependabot.yml reviewers key to path-based CODEOWNERS rules.

Changes:

• Removed the deprecated/no-op reviewers key from the Bundler section in .github/dependabot.yml.
• Added CODEOWNERS entries to request reviews from @wordpress-mobile/apps-infra-tooling for Ruby tooling files (Gemfile*, .ruby-version, .bundle/, .rubocop*.yml).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
.github/dependabot.yml	Removes deprecated Dependabot reviewer configuration for Bundler updates.
.github/CODEOWNERS	Adds ownership rules so Dependabot Ruby/tooling PRs request reviews from the tooling team.

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[mokagio]

I like how generic the pattern is. It will remain valid even if those files are moved to subfolders.

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Posted by Claude (Opus 4.8) on behalf of @mokagio with approval.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress Android by scanning the QR code below to install the corresponding build.

	App Name	WordPress Android
	Build Type	Debug
	Version	pr22933-3f3ae94
	Build Number	1493
	Application ID	org.wordpress.android.prealpha
	Commit	3f3ae94
	Installation URL	1iercj7t7o24g

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack Android by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Android
	Build Type	Debug
	Version	pr22933-3f3ae94
	Build Number	1493
	Application ID	com.jetpack.android.prealpha
	Commit	3f3ae94
	Installation URL	7o0ql76c0oj1g

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.