FIX: Update docs' landing page with new logo image

[ninamiolane]

Checklist

• My pull request has a clear and explanatory title.
• My pull request passes the Linting test.
• I added appropriate unit tests and I made sure the code passes all unit tests. (refer to comment below)
• My PR follows PEP8 guidelines. (refer to comment below)
• My code is properly documented, using numpy docs conventions, and I made sure the documentation renders properly.
• I linked to issues and PRs that are relevant to this PR.

Description

Issue

Additional context

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.49%. Comparing base (bdbe647) to head (ba68644).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #72   +/-   ##
=======================================
  Coverage   61.49%   61.49%           
=======================================
  Files          95       95           
  Lines        2361     2361           
=======================================
  Hits         1452     1452           
  Misses        909      909           

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