Fix month name spelling error. Fixes incorrect dates on evolution dashboard. (#2303)

Author: dempseyatgithub

proposals/0421-generalize-async-sequence.md

@@ -3,7 +3,7 @@
 * Proposal: [SE-0421](0421-generalize-async-sequence.md)
 * Authors: [Doug Gregor](https://github.com/douggregor), [Holly Borla](https://github.com/hborla)
 * Review Manager: [Freddy Kellison-Linn](https://github.com/Jumhyn)
-* Status: **Active review (January 26...Febuary 7, 2024)**
+* Status: **Active review (January 26...February 7, 2024)**
 * Implementation: https://github.com/apple/swift/pull/70635
 * Review: ([pitch](https://forums.swift.org/t/pitch-generalize-asyncsequence-and-asynciteratorprotocol/69283))([review](https://forums.swift.org/t/se-0421-generalize-effect-polymorphism-for-asyncsequence-and-asynciteratorprotocol/69662))