Update USING_ADVANCED.md

[Martii]

Fix a typo

Marked version:
n/a

Markdown flavor: n/a

Description

• Fixes #### (if fixing a known issue; otherwise, describe issue using the following format)

n/a

Contributor

• Test(s) exist to ensure functionality and minimize regression (if no tests added, list tests covering this PR); or,
• no tests required for this PR.
• If submitting new feature, it has been documented in the appropriate places.

Committer

In most cases, this should be a different person than the contributor.

• Draft GitHub release notes have been updated.
• CI is green (no forced merge required).
• Merge PR

[styfle]

@Martii Thanks! 👍