docs(website): updated reference from ignoreSynchronization to waitFo…

[MichaelRijsdijk]

docs(website): updated reference from ignoreSynchronization to waitForAngularEnabled(false).

Updated wording to relfect the content it's linked to.

• FAQ how to handle log-in page used old ignoreSynchronization but linked to waitForAngularEnabled(false).

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[googlebot]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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• If you've already signed a CLA, it's possible we don't have your GitHub username or you're using a different email address. Check your existing CLA data and verify that your email is set on your git commits.
• If your company signed a CLA, they designated a Point of Contact who decides which employees are authorized to participate. You may need to contact the Point of Contact for your company and ask to be added to the group of authorized contributors. If you don't know who your Point of Contact is, direct the project maintainer to go/cla#troubleshoot.
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[MichaelRijsdijk]

I signed it!

[googlebot]

CLAs look good, thanks!

[googlebot]

CLAs look good, thanks!

[wswebcreation]

Hi @MichaelRijsdijk
Tnx for the PR ;-)

@qiyigg
Can you merge this one?