Bump attackcti from 0.3.9 to 0.4.2

Bumps [attackcti](https://github.com/OTRF/ATTACK-Python-Client) from 0.3.9 to 0.4.2.
- [Release notes](https://github.com/OTRF/ATTACK-Python-Client/releases)
- [Changelog](https://github.com/OTRF/ATTACK-Python-Client/blob/master/CHANGELOG.md)
- [Commits](OTRF/ATTACK-Python-Client@0.3.9...0.4.2)

---
updated-dependencies:
- dependency-name: attackcti
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -1,4 +1,4 @@
-attackcti==0.3.9
+attackcti==0.4.2
 docker==6.1.3
 GitPython==3.1.43
 Jinja2==3.1.3