Update gemoji requirement from ~> 3.0 to ~> 4.1

[dependabot[bot]]

Updates the requirements on gemoji to permit the latest version.

Release notes

Sourced from gemoji's releases.

gemoji 4.1.0

What's Changed

• Import Emoji 15.0 characters by @​mislav in github/gemoji#261
• Support skin tones for :people_holding_hands: emoji by @​mislav in github/gemoji#262

Full Changelog: https://github.com/github/gemoji/compare/v4.0.1...v4.1.0

Commits

• 5476a66 gemoji 4.1.0
• ee6e06c Merge pull request #262 from github/skin-tones-couple
• da33f74 Support skin tones for :people_holding_hands: emoji
• 07b49d7 Merge pull request #261 from github/unicode-15
• cb5c514 Import Emoji 15.0 characters
• ed57eb8 gemoji 4.0.1
• 33caddc Fix Ruby 2.6 breakage (#255)
• ac35c33 gemoji 4.0.0
• 70eb18c Merge pull request #165 from github/skin-tones
• d04fd77 Merge pull request #253 from github/tests-refresh
• Additional commits viewable in compare view

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[github-actions[bot]]

Not approving this PR because it includes a major update of a dependency. Please review the changes and approve manually.