Improve documentation

[elic-eon]

🤔 Why?

Add one line of SQL in the Postgres Profile connector readme.

🤓 What?

🧪 Tested?

☑️ Checks

• My PR contains actual code changes, and I have updated the version number in pyproject.toml.

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
11804	10483	89%	85%	🟢

New Files

No new covered files...

Modified Files

No covered modified files...

updated for commit: b73e080 by action🐍

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.80%. Comparing base (71fff35) to head (b73e080).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #964   +/-   ##
=======================================
  Coverage   88.80%   88.80%           
=======================================
  Files         182      182           
  Lines       11804    11804           
=======================================
  Hits        10483    10483           
  Misses       1321     1321           

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