Fix changelog milestone (#5194)

Pull request: #5194

Author: lefou

changelog.adoc

@@ -18,7 +18,7 @@ _2025-05-25_
 
 :version: 1.0.0-RC1
 :milestone-name: 1.0.0-RC1
-:milestone: 115
+:milestone: 118
 :prev-version: 0.12.14
 
 `1.0.0-RC1` is the first release candidate of the upcoming Mill 1.0.0 release. This is a major