Chore(docs): Update the sample Compose file to latest database

[stumpylog]

Proposed change

Both releases have been out for some time now and I didn't encounter any issues with either in testing.

Type of change

• Bug fix: non-breaking change which fixes an issue.
• New feature / Enhancement: non-breaking change which adds functionality. Please read the important note above.
• Breaking change: fix or feature that would cause existing functionality to not work as expected.
• Documentation only.
• Other. Please explain:

Checklist:

• I have read & agree with the contributing guidelines.
• If applicable, I have included testing coverage for new code in this PR, for backend and / or front-end changes.
• If applicable, I have tested my code for new features & regressions on both mobile & desktop devices, using the latest version of major browsers.
• If applicable, I have checked that all tests pass, see documentation.
• I have run all pre-commit hooks, see documentation.
• I have made corresponding changes to the documentation as needed.
• I have checked my modifications for any breaking changes.

[shamoon]

Databases make me nervous ha but agree seems like good housekeeping, thanks

[stumpylog]

They should be well tested and any bugs with the major versions fixed by this point. That's why I waited a bit :)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.19%. Comparing base (d4d0604) to head (3fd6975).

❗ Current head 3fd6975 differs from pull request most recent head fa4e73f. Consider uploading reports for the commit fa4e73f to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #6639      +/-   ##
==========================================
- Coverage   98.63%   97.19%   -1.44%     
==========================================
  Files         248      436     +188     
  Lines        8559    17957    +9398     
  Branches     1481     1480       -1     
==========================================
+ Hits         8442    17453    +9011     
- Misses        114      501     +387     
  Partials        3        3              

Flag	Coverage Δ
backend	95.88% <ø> (?)
frontend	98.63% <ø> (ø)

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[WebDucer]

How about the "migration" docs? As I know, switching Postgres versions is normally not enough (so it is not a "patch"), there is more work needed.

[stumpylog]

Documentation already exists and is linked to from our documentation