DOC: Fix non-linked referenced methods in IncrementalBasicStatistics

[david-cortes-intel]

Description

Fixes some doc pages that reference class methods without linking to them.

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Checklist:

Completeness and readability

• I have updated the documentation to reflect the changes or created a separate PR with updates and provided its number in the description, if necessary.
• Git commit message contains an appropriate signed-off-by string (see CONTRIBUTING.md for details).
• I have resolved any merge conflicts that might occur with the base branch.

Testing

• I have run it locally and tested the changes extensively.
• All CI jobs are green or I have provided justification why they aren't.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Flag	Coverage Δ
azure	80.47% <ø> (ø)

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Files with missing lines	Coverage Δ
...x/basic_statistics/incremental_basic_statistics.py	95.69% <ø> (ø)

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