Bump astropy from 4.2 to 5.3.3 in /galaxy_mergers

[dependabot[bot]]

Bumps astropy from 4.2 to 5.3.3.

Release notes

Sourced from astropy's releases.

v5.3.3 Release Notes

See https://docs.astropy.org/en/v5.3.3/changelog.html

v5.3.2 Release Notes

See https://docs.astropy.org/en/v5.3.2/changelog.html

v5.3.1

See CHANGES.rst for the full changelog

v5.3

See CHANGES.rst for the full changelog

v5.2.2

See CHANGES.rst for the full changelog.

v5.2.1

See CHANGES.rst for the full changelog.

v5.2

See CHANGES.rst for the full changelog

v5.1.1

See CHANGES.rst for the full changelog

v5.1

See CHANGES.rst for the full changelog

v5.0.8 Release Notes

See https://docs.astropy.org/en/v5.0.x/changelog.html

v5.0.6

See CHANGES.rst for the full changelog.

v5.0.5

See CHANGES.rst for the full changelog

v5.0.4

See CHANGES.rst for the full changelog

v5.0.3

See CHANGES.rst for the full changelog

v5.0.2

See CHANGES.rst for the full changelog

v5.0.1

See CHANGES.rst for the full changelog

v5.0

See CHANGES.rst for the full changelog

... (truncated)

Commits

• 6258f07 Merge pull request #15286 from astrofrog/v5.3.3-changelog
• 8de0b5b Finalizing changelog for v5.3.3
• 7dcc0cd Merge pull request #15263 from astropy/update-iers-v5.3.x-1693526610
• a20ace4 Update IERS Earth rotation and leap second tables
• 7a4c713 Merge pull request #15234 from pllim/pin-numpy-lt-2
• 710cbc0 Merge pull request #15249 from meeseeksmachine/auto-backport-of-pr-15155-on-v...
• 8590f0c Backport PR #15155: Documentation fix for issue #15132 PrimaryHDU.fromstring(...
• a45198f Merge pull request #15246 from meeseeksmachine/auto-backport-of-pr-15244-on-v...
• 43c9e01 Backport PR #15244: RTD: No more system_packages
• 9580b23 TST: Update modeling test logic
• Additional commits viewable in compare view

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