fix: delete unnecessary asterisk

[KisaragiEffective]

followup fix of #4136, which I should've payed attention.

[prmerger-automator]

@KisaragiEffective : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[opbld31]

Docs Build status updates of commit 9b5f3b8:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/c-runtime-library/reference/fopen-wfopen.md	✅Succeeded

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[tuckstarrydell]

# @tuckstarrydell

[Court72]

Looks good; thanks, @KisaragiEffective