docs: use postgres 14 in code snippets.

[ioga]

Description

Update docs to use postgreql 14 instead of 10. Also explicitly state that any version later than 10 is supported.

Test Plan

N/A

Checklist

• Changes have been manually QA'd
• New features have been approved by the corresponding PM
• User-facing API changes have the "User-facing API Change" label
• Release notes have been added as a separate file under docs/release-notes/
  See Release Note for details.
• Licenses have been included for new code which was copied and/or modified from any external code

[netlify]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.33%. Comparing base (1c7f4b5) to head (6d2cd98).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9691   +/-   ##
=======================================
  Coverage   53.33%   53.33%           
=======================================
  Files        1255     1255           
  Lines      152702   152702           
  Branches     3249     3249           
=======================================
+ Hits        81449    81450    +1     
+ Misses      71101    71100    -1     
  Partials      152      152           

Flag	Coverage Δ
backend	44.76% <ø> (+<0.01%)	⬆️
harness	72.84% <ø> (ø)
web	51.58% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

see 4 files with indirect coverage changes

[tara-hpe]

LGTM