doc: comment mount-options in example

[andyzhangx]

What type of PR is this?
/kind documentation

What this PR does / why we need it:
doc: remove mount-options in example

Which issue(s) this PR fixes:

Fixes #274

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

none

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx

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[coveralls]

Pull Request Test Coverage Report for Build 1749812265

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 77.716%

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Totals
Change from base Build 1749473497:	0.0%
Covered Lines:	558
Relevant Lines:	718

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💛 - Coveralls

[pohly]

Why this change?

I have no opinion about it. But as I don't see a reason in the commit message or the PR description, I can't review this.

[andyzhangx]

Why this change?

I have no opinion about it. But as I don't see a reason in the commit message or the PR description, I can't review this.

this PR fixed #274, we only want to make this secret optional in storage class example, otherwise user would hit error when applying this example. I renamed this PR title to comment mount-options in example

[YuikoTakada]

Thank you for your PR.
Is this /kind documentation ? not /kind bug ?

[andyzhangx]

Thank you for your PR. Is this /kind documentation ? not /kind bug ?

@YuikoTakada aha, it's doc bug