Fix(modal): Use new anchor class for ask question on wiki page

[kevinzluo]

Fixes #4230 (<=== Add issue number here)

Replaces the changes in #4239 using the new anchor class.

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[SidharthBansal]

Awesome great!!!
Kevin it will be great if you can look backward and see which PRS needs to be made again like this one.
They can be either by you or by any one else.
You can send those PR fixes too yourself.

Thanks a lot