Fix: Text in other languages was removed from anchors

[AmosHuKe]

ref flutter/website#11151

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• I’ve reviewed the contributor guide and applied the relevant portions to this PR.
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• This PR follows the Google Developer Documentation Style Guidelines — for example, it doesn't use i.e. or e.g., and it avoids I and we (first person).
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Contribution guidelines:

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[AmosHuKe]

cc @parlough

[parlough]

/gcbrun

[parlough]

Thanks for updating both files here too!!

[dart-github-bot]

Visit the preview URL for this PR (updated for commit f017bb0):

https://dart-dev--pr6094-patch-anchors-1-qthw0rov.web.app