Bump astropy from 4.3.1 to 5.3.3 in /frontend/docker

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] <[email protected]>

Author: dependabot[bot]

frontend/docker/requirements.txt

@@ -1,4 +1,4 @@
-astropy==4.3.1
+astropy==5.3.3
 dash==1.21.0
 dash-core-components==1.17.1
 dash-html-components==1.1.4