Fix reCAPTCHA not initialized when send SMS code

What does this MR do and why?

The reCAPTCHA is not initialized when both tencent_captcha and geetest_captcha FF are off in the sending SMS page.

This MR is to pass a correct captchaSiteKey in this specific scenario

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How to set up and validate locally

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.

/cc @mtan-gitlab-cn