deps: update actions/checkout digest to a5ac7e5

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	digest	0ad4b8f -> a5ac7e5

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[suztomo]

Error: Errors: Error: ConnectionWorkerPoolTest.testSingleTableConnection_noOverwhelmedConnection:97->testSendRequestsToMultiTable:206 » Execution com.google.cloud.bigquery.storage.v1.Exceptions$MaximumRequestCallbackWaitTimeExceededException: Request has waited in inflight queue for PT4.003668Sms for writer 81abb6ab-f089-45a7-bd85-f6a9f30307a7, which is over maximum wait time PT4S

[gcf-merge-on-green]

Merge-on-green attempted to merge your PR for 6 hours, but it was not mergeable because either one of your required status checks failed, one of your required reviews was not approved, or there is a do not merge label. Learn more about your required status checks here: https://help.github.com/en/github/administering-a-repository/enabling-required-status-checks. You can remove and reapply the label to re-run the bot.

[PhongChuong]

/gcbrun