Update actionmailer requirement from ~> 3.2.1 to >= 3.2.1, < 6.1.0#1

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dependabot/bundler/actionmailer-gte-3.2.1-and-lt-6.1.0ASCTech/mailbag:dependabot/bundler/actionmailer-gte-3.2.1-and-lt-6.1.0Copy head branch name to clipboard