Update get-timezone.md

[stephen9357]

Add a hint to avoid calling _get_timezone always returns the default value.

[prmerger-automator]

@stephen9357 : Thanks for your contribution! The author(s) have been notified to review your proposed change.

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[Court72]

@TylerMSFT

Can you review the proposed changes?

When the changes are ready for publication, add a #sign-off comment to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

[TylerMSFT]

There's a typo on value. Also, consider rewording to put the reason first and the corrective action second, e.g. "If you don't want the default value, call _tzset first to initialize the timezone." I also added code escape for code so that machine translation doesn't take a shot at it for other languages.

[TylerMSFT]

I went ahead and fixed the typo and did the small rewording.

[learn-build-service-prod]

Learn Build status updates of commit c0903a4:

✅ Validation status: passed

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

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[TylerMSFT]

#sign-off