chore: prep v3.9.0 (#573)

jkowalleck · web-flow · commit 0301e2c16ede · 2025-12-02T11:32:20.000+01:00
Signed-off-by: Jan Kowalleck &lt;jan.kowalleck@gmail.com&gt;
diff --git a/HISTORY.md b/HISTORY.md
@@ -6,6 +6,8 @@ All notable changes to this project will be documented in this file.
 
 <!-- add unreleased items here -->
 
+## 3.9.0 - 2025-12-02
+
 * Added
   * new Entry point `\CycloneDX\Contrib` (via [#569])
 * Changed
diff --git a/semver.txt b/semver.txt
@@ -1 +1 @@
-3.8.0
+3.9.0
