Update release notes wrt #1041

Author: k163377

release-notes/CREDITS-2.x

@@ -18,6 +18,7 @@ Contributors:
 # 2.21.0 (not yet released)
 
 WrongWrong (@k163377)
+* #1041: Remove MissingKotlinParameterException
 * #1039: Update settings for 2.20
 
 # 2.20.0 (28-Aug-2025)

release-notes/VERSION-2.x

@@ -18,6 +18,7 @@ Co-maintainers:
 
 2.21.0 (not yet released)
 
+#1041: The deprecated MissingKotlinParameterException has been removed.
 #1039: Kotlin has been upgraded to 2.1.x.
 
 2.20.0 (28-Aug-2025)