build(deps): bump astropy from 5.3.4 to 6.0.0

Bumps [astropy](https://github.com/astropy/astropy) from 5.3.4 to 6.0.0.
- [Release notes](https://github.com/astropy/astropy/releases)
- [Changelog](https://github.com/astropy/astropy/blob/main/docs/changelog.rst)
- [Commits](astropy/astropy@v5.3.4...v6.0.0)

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

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

requirements.txt

@@ -1,4 +1,4 @@
-astropy==5.3.4
+astropy==6.0.0
 matplotlib==3.8.1
 numpy==1.26.1
 scipy==1.11.3