Correct the link for Implementation of 0028-locale-region-category.md (#1420)

Author: lamtrinhdev

Proposals/0028-locale-region-category.md

@@ -3,7 +3,7 @@
 * Proposal: [SF-0028](0028-locale-region-category.md)
 * Authors: [Tina Liu](https://github.com/itingliu)
 * Review Manager: [Jeremy Schonfeld](https://github.com/jmschonfeld)
-* Implementation: [https://github.com/swiftlang/swift-foundation/pull/1253]()
+* Implementation: [https://github.com/swiftlang/swift-foundation/pull/1253](https://github.com/swiftlang/swift-foundation/pull/1253)
 * Status: **Accepted**
 * Reviews: [Pitch](https://forums.swift.org/t/pitch-category-support-for-locale-region/79240), [Review](https://forums.swift.org/t/review-sf-0028-locale-region-category/80415)