Correct some broken Markdown links

Author: pcolby

CHANGELOG.md

@@ -15,10 +15,10 @@
 
 ### Fixed
 
-- Output buffering issue on MinGW builds with Qt 6.5, 6.6 and 6.7 [cc5ff57]()
+- Output buffering issue on MinGW builds with Qt 6.5, 6.6 and 6.7 ([cc5ff57][])
 - Work around Qt 6.9.0 beta 3 broken translations ([45bd46d][])
 
-## [0.5.4][2025-02-01]
+## [0.5.4][] (2025-02-01)
 
 ### Added