Bump pyrofork from 2.3.15 to 2.3.21.post3

[dependabot[bot]]

Bumps pyrofork from 2.3.15 to 2.3.21.post3.

Commits

• 05386b5 Pyrofork: Bump version to v2.3.20.post3
• 9a50847 Pyrofork: methods: send_media_group: Remove extras comma (,)
• 7fed449 Pyrofork: Update updates/news channel link
• 2681025 Pyrofork: Bump version to v2.3.20.post2
• be47594 Merge pull request #61 from AnonymousX1025/patch-1
• 849be50 Merge pull request #60 from X1A0CA1/main
• af9e137 Typo
• fd0a23a docs(update_birthday): Fix error in examples
• d1e20a0 Pyrofork: Bump version to v2.3.21.post1
• a1e8729 Pyrofork: Fix birthday field docs in class Chat
• Additional commits viewable in compare view

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