fix(markdown): replace double quotation marks in classname(fix #3152)

[spencerHT]

Summary

What kind of change does this PR introduce? (check at least one)

• Bugfix: close Code Component have overflow classname for language support #3152
• Feature
• Code style update
• Refactor
• Docs
• Build-related changes
• Other, please describe:

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Does this PR introduce a breaking change? (check one)

• Yes
• No

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The PR fulfills these requirements:

• When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)

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• Firefox
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• A convincing reason for adding this feature
• Related documents have been updated
• Related tests have been updated

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Other information:

[spencerHT]

PTAL @ulivz

[ulivz]

LGTM, Thanks