chore(deps): update dependency rxcocoa to v6.7.1

[renovate]

This PR contains the following updates:

Package	Update	Change
RxCocoa	minor	6.2.0 -> 6.7.1

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Configuration

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🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: Podfile.lock

Analyzing dependencies
Adding spec repo `trunk` with CDN `https://cdn.cocoapods.org/`

CocoaPods 1.15.0 is available.
To update use: `gem install cocoapods`

For more information, see https://blog.cocoapods.org and the CHANGELOG for this version at https://github.com/CocoaPods/CocoaPods/releases/tag/1.15.0

[!] CocoaPods could not find compatible versions for pod "RxSwift":
  In snapshot (Podfile.lock):
    RxSwift (= 6.2.0)

  In Podfile:
    RxCocoa (= 6.7.1) was resolved to 6.7.1, which depends on
      RxSwift (= 6.7.1)

    RxSwift (= 6.2.0)