Bump strax from 1.2.2 to 1.2.3 in /extra_requirements (#390)

Bumps [strax](https://github.com/AxFoundation/strax) from 1.2.2 to 1.2.3.
- [Release notes](https://github.com/AxFoundation/strax/releases)
- [Changelog](https://github.com/AxFoundation/strax/blob/master/HISTORY.md)
- [Commits](AxFoundation/strax@v1.2.2...v1.2.3)

---
updated-dependencies:
- dependency-name: strax
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

extra_requirements/requirements-tests.txt

@@ -1,4 +1,4 @@
-strax==1.2.2
+strax==1.2.3
 straxen==1.7.1
 epix==0.3.1
 git+https://github.com/XENONnT/ax_env