Fix method name to check_all_pending!

[sinsoku]

Motivation / Background

Because check_pending_migrations! mentioned in the warning message does not exist.

Detail

The method added in 03379d1 is check_all_pending!, not check_pending_migrations!.

Additional information

Checklist

Before submitting the PR make sure the following are checked:

• This Pull Request is related to one change. Changes that are unrelated should be opened in separate PRs.
• Commit message has a detailed description of what changed and why. If this PR fixes a related issue include it in the commit message. Ex: [Fix #issue-number]
• [-] Tests are added or updated if you fix a bug or add a feature.
• [-] CHANGELOG files are updated for the changed libraries if there is a behavior change or additional feature. Minor bug fixes and documentation changes should not be included.

[eileencodes]

Thank you, can't believe I typo'd that 🤦🏼‍♀️