Bump astropy from 4.3.1 to 5.3.3 (#12)

Bumps [astropy](https://github.com/astropy/astropy) from 4.3.1 to 5.3.3.
- [Release notes](https://github.com/astropy/astropy/releases)
- [Changelog](https://github.com/astropy/astropy/blob/main/docs/changelog.rst)
- [Commits](astropy/astropy@v4.3.1...v5.3.3)

---
updated-dependencies:
- dependency-name: astropy
  dependency-type: direct:production
...

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

requirements.txt

@@ -3,7 +3,7 @@ annotated-types==0.5.0
 anyio==3.7.1
 argon2-cffi==23.1.0
 argon2-cffi-bindings==21.2.0
-astropy==4.3.1
+astropy==5.3.3
 astunparse==1.6.3
 attrs==23.1.0
 backcall==0.2.0