Update drop-table-transact-sql.md

[JBAtReal]

Change "isn't" to "IS NOT" in SQL statement

[prmerger-automator]

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

[learn-build-service-prod]

Learn Build status updates of commit 9852c83:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/t-sql/statements/drop-table-transact-sql.md	✅Succeeded

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[v-dirichards]

@WilliamDAssafMSFT

Can you review the proposed changes?

Due to the upcoming BUILD conference, all merging and publishing is on hold until the morning of May 19th.

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

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

[WilliamDAssafMSFT]

Ugh. Thanks @JBAtReal for taking the time to submit this PR! Good catch. This was a grammar checker recommendation that was accidentally accepted by its human editor.

Your commit will be merged and this article update is in flight. After the updated article is published, GitHub will list you as an article contributor.

Thanks again for this feedback, your suggestions help improve our documentation.

Likely live on May 19.

#sign-off

[prmerger-automator]

PR 10090 has been merged from JBAtReal:patch-1 to MicrosoftDocs:live by rwestMSFT.

@JBAtReal, @WilliamDAssafMSFT