Don't use get_tmaps=True if tmaps aren't used

[crossmanith]

• Closes [DOC] Don't set get_tmaps=True if tmaps aren't used #4135

Changes proposed in this pull request:

• Remove get_tmaps=True from all calls to fetch_localizer_contrasts() because tmaps aren't used in the examples.

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0a08873) 91.85% compared to head (f471a38) 91.90%.
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4136      +/-   ##
==========================================
+ Coverage   91.85%   91.90%   +0.05%     
==========================================
  Files         144      145       +1     
  Lines       16241    16330      +89     
  Branches     3386     3404      +18     
==========================================
+ Hits        14918    15008      +90     
+ Misses        780      778       -2     
- Partials      543      544       +1     

Flag	Coverage Δ
macos-latest_3.10_test_plotting	91.68% <ø> (+0.01%)	⬆️
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macos-latest_3.12_test_plotting	91.68% <ø> (+0.01%)	⬆️
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[ymzayek]

thanks @crossmanith ! LGTM can you just accept the suggestions and then also add a whatsnew entry to doc/changes/latest.rst and your name to CITATION.cff? (see https://nilearn.github.io/dev/development.html#changelog for more detail)

[bthirion]

LGTM, thx.

[ymzayek]

Thx @crossmanith !