Update CHANGELOG and docs for v8.31.1

Author: gaeljw

CHANGELOG.md

@@ -13,14 +13,18 @@ See also the [CHANGELOG](https://github.com/cucumber/cucumber-jvm/blob/master/CH
 
 ### Changed
 
-- [Core] Update `cucumber-core` dependency to [7.27.2](https://github.com/cucumber/cucumber-jvm/blob/main/CHANGELOG.md)
-
 ### Deprecated
 
 ### Removed
 
 ### Fixed
 
+## [8.31.1] (2025-08-19)
+
+### Changed
+
+- [Core] Update `cucumber-core` dependency to [7.27.2](https://github.com/cucumber/cucumber-jvm/blob/main/CHANGELOG.md)
+
 ## [8.31.0] (2025-07-28)
 
 ### Changed
@@ -755,6 +759,7 @@ _Although there is no visible change from a user perspective, there are signific
 <!-- Releases -->
 [Unreleased]: https://github.com/cucumber/cucumber-jvm-scala/compare/v8.30.2-SNAPSHOT...HEAD
 [8.31.0-SNAPSHOT]:  https://github.com/cucumber/cucumber-jvm-scala/compare/v8.30.2...v8.31.0-SNAPSHOT
+[8.31.0-SNAPSHOT]:  https://github.com/cucumber/cucumber-jvm-scala/compare/v8.31.1...v8.31.0-SNAPSHOT
 [8.30.2-SNAPSHOT]:  https://github.com/cucumber/cucumber-jvm-scala/compare/v8.30.1...v8.30.2-SNAPSHOT
 [8.30.1]:  https://github.com/cucumber/cucumber-jvm-scala/compare/v8.30.0...v8.30.1
 [8.30.0]:  https://github.com/cucumber/cucumber-jvm-scala/compare/v8.29.0...v8.30.0

version.sbt

@@ -1 +1 @@
-ThisBuild / version := "8.31.1-SNAPSHOT"
+ThisBuild / version := "8.31.1"