[hotfix][doc] Fix invalid sql comments and words in timezone.md

[hackergin]

What is the purpose of the change

Fix invalid sql comment and words in timezone.md

Brief change log

• Fix invalid sql comment and words in timezone.md

Verifying this change

• doc fix , not need to verify

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): (no)
• The public API, i.e., is any changed class annotated with @Public(Evolving): (no)
• The serializers: (no)
• The runtime per-record code paths (performance sensitive): (no)
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (no)
• The S3 file system connector: (no)

Documentation

• Does this pull request introduce a new feature? (no)

[hackergin]

@leonardBang A small fix for timezone doc.

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Automated Checks

Last check on commit 265e46e (Fri May 28 11:05:07 UTC 2021)

Warnings:

• Documentation files were touched, but no docs/content.zh/ files: Update Chinese documentation or file Jira ticket.

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Review Progress

• ❓ 1. The [description] looks good.
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• ❓ 3. Needs [attention] from.
• ❓ 4. The change fits into the overall [architecture].
• ❓ 5. Overall code [quality] is good.

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CI report:

• 265e46e Azure: SUCCESS

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[leonardBang]

LGTM

[hackergin]

move changes to #15753 and close this pr.