Bump attrs from 22.2.0 to 23.1.0 in /stix_shifter

Bumps [attrs](https://github.com/python-attrs/attrs) from 22.2.0 to 23.1.0.
- [Release notes](https://github.com/python-attrs/attrs/releases)
- [Changelog](https://github.com/python-attrs/attrs/blob/main/CHANGELOG.md)
- [Commits](python-attrs/attrs@22.2.0...23.1.0)

---
updated-dependencies:
- dependency-name: attrs
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

stix_shifter/requirements.txt

@@ -4,7 +4,7 @@ aiomysql==0.2.0
 antlr4-python3-runtime==4.8
 asyncio==3.4.3
 asynctest==0.13.0
-attrs==22.2.0
+attrs==23.1.0
 azure-identity==1.12.0
 colorlog==6.7.0
 flask==2.3.3