Update dependabot for boto3 and botocore #371
Description
Major versions only in .github/dependabot.yml: https://github.blog/changelog/2021-05-21-dependabot-version-updates-can-now-ignore-major-minor-patch-releases/
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Major versions only in .github/dependabot.yml: https://github.blog/changelog/2021-05-21-dependabot-version-updates-can-now-ignore-major-minor-patch-releases/