[Docs] Align sd code lines with Flytesnacks example

[JiangJiaWei1103]

Tracking issue

Why are the changes needed?

Code snippets on this page are out of sync of this Flytesnacks example after recent transition from rli to literalinclude.

What changes were proposed in this pull request?

Align code snippets on the doc page with the corresponding example.

Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Related PRs

#6008

Docs link

https://flyte--6063.org.readthedocs.build/en/6063/user_guide/data_types_and_io/structureddataset.html

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 37.10%. Comparing base (be4d009) to head (a01b520).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6063      +/-   ##
==========================================
- Coverage   37.10%   37.10%   -0.01%     
==========================================
  Files        1318     1318              
  Lines      132326   132326              
==========================================
- Hits        49100    49094       -6     
- Misses      78954    78960       +6     
  Partials     4272     4272              

Flag	Coverage Δ
unittests-datacatalog	51.58% <ø> (ø)
unittests-flyteadmin	54.07% <ø> (-0.03%)	⬇️
unittests-flytecopilot	30.99% <ø> (ø)
unittests-flytectl	62.29% <ø> (ø)
unittests-flyteidl	7.23% <ø> (ø)
unittests-flyteplugins	53.82% <ø> (ø)
unittests-flytepropeller	42.63% <ø> (ø)
unittests-flytestdlib	57.59% <ø> (ø)

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