chore: prep v5.1.1

Signed-off-by: Jan Kowalleck <[email protected]>

Author: jkowalleck

HISTORY.md

@@ -6,6 +6,8 @@ All notable changes to this project will be documented in this file.
 
 <!-- unreleased changes go here -->
 
+## 5.1.1 - 2025-09-16
+
 * Runtime Dependencies
   * Support `@cyclonedx/cyclonedx-library@^9.0.0`, was `^8.4.0||^9.0.0` (via [#1433])
 * Build