Update PostgreSQL image and clone command in docs

[baa-ableton]

Problem

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Closes: #ISSUE-NUMBER

Solution

Please describe your change as it relates to the problem, or bug fix, as well as any dependencies. If your change requires a database schema migration, please describe the schema modification(s) and whether it's a backwards-incompatible or backwards-compatible change.

Note: All database schema changes require discussion. Please link the issue for context.

One-line summary:

Checklist

• You've signed-off your work
• Your changes are accompanied by tests (if relevant)
• Your change contains a small diff and is self-contained
• You've updated any relevant documentation (if relevant)
• You've included a one-line summary of your change for the CHANGELOG.md (Depending on the change, this may not be necessary).
• You've versioned your .sql database schema migration according to Flyway's naming convention (if relevant)
• You've included a header in any source code files (if relevant)

[boring-cyborg]

Thanks for opening your first pull request in the Marquez project! Please check out our contributing guidelines (https://github.com/MarquezProject/marquez/blob/main/CONTRIBUTING.md).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.18%. Comparing base (a89b89c) to head (553716c).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #3092   +/-   ##
=========================================
  Coverage     81.18%   81.18%           
  Complexity     1506     1506           
=========================================
  Files           268      268           
  Lines          7356     7356           
  Branches        325      325           
=========================================
  Hits           5972     5972           
  Misses         1226     1226           
  Partials        158      158           

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[merobi-hub]

LGTM, thanks for contribution!

[merobi-hub]

@baa-ableton would you please sign off on your commits?

[merobi-hub]

@baa-ableton would you please replace the image with a bitnamilegacy image?

[baa-ableton]

@merobi-hub yeahhhh I committed using the GH web edit interface thing :/ . I'll fix the DCO and check the other comment you left

[baa-ableton]

@merobi-hub all done

[boring-cyborg]

Great job! Congrats on your first merged pull request in the Marquez project!