docs: use smaller subset in 10 minutes tutorial

[dkrako]

Description

Fixes issue #694

Implemented changes

• [x] decrease subset size to not exceed memory resources from readthedocs

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] This change is or requires a documentation update

How Has This Been Tested?

• [x] I have checked the branch on readthedocs and the build succeeded

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (a8a0d73) to head (ab82f2c).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #707 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 57 57 Lines 2649 2649 Branches 663 663 ========================================= Hits 2649 2649 ```

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[SiQube]

great PR!