Bump pyiron-atomistics from 0.6.14 to 0.6.15

Bumps [pyiron-atomistics](https://github.com/pyiron/pyiron_atomistics) from 0.6.14 to 0.6.15.
- [Release notes](https://github.com/pyiron/pyiron_atomistics/releases)
- [Changelog](https://github.com/pyiron/pyiron_atomistics/blob/main/CHANGELOG.md)
- [Commits](pyiron/pyiron_atomistics@pyiron_atomistics-0.6.14...pyiron_atomistics-0.6.15)

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

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

setup.py

@@ -33,7 +33,7 @@
     packages=find_packages(exclude=["*tests*", "*docs*", "*binder*", "*conda*", "*notebooks*", "*.ci_support*"]),
     install_requires=[
         'pyiron_base==0.10.4',
-        'pyiron_atomistics==0.6.14',
+        'pyiron_atomistics==0.6.15',
         'ipywidgets==8.1.5',
         'matplotlib==3.9.2',
         'nbconvert==7.16.4',