fix changelog PR links

Author: ChronosMasterOfAllTime

CHANGELOG.md

@@ -58,7 +58,8 @@ Change line format:
 ### Added
 
 - Support Golang 1.18.9 and 1.19.4 https://github.com/syndbg/goenv/pull/277
-- Support 1.18.10, 1.19.5, 1.20rc2: https://github.com/syndbg/goenv/pull/275
+- Support 1.20rc1 https://github.com/syndbg/goenv/pull/278
+- Support 1.18.10, 1.19.5, 1.20rc2: https://github.com/syndbg/goenv/pull/282
 
 ## 2.0.4