update changelog and bump version

Author: mashehu

CHANGELOG.md

@@ -1,5 +1,11 @@
 # nf-core/tools: Changelog
 
+## [v3.3.1 - Tungsten Tamarin Patch](https://github.com/nf-core/tools/releases/tag/3.3.1) - [2025-06-02]
+
+### Template
+
+- Fix nf-test.yml file formatting ([#3601](https://github.com/nf-core/tools/pull/3601))
+
 ## [v3.3.0 - Tungsten Tamarin](https://github.com/nf-core/tools/releases/tag/3.3.0) - [2025-06-02]
 
 **Highlights**

setup.py

@@ -2,7 +2,7 @@
 
 from setuptools import find_packages, setup
 
-version = "3.3.0"
+version = "3.3.1"
 
 with open("README.md") as f:
     readme = f.read()