[Samples][InputValidation] Inputs.json should be updated to not use placeholders as labels

[RebeccaAnne]

Platform

Sample

Details

Current guidance from the Accessibility team is that using placeholders as labels is not a best practice. Additionally, per #4356, our required input indicators will not show up on inputs that don't have labels. In order to set a good example for our card authors, our Inputs.json sample should be updated to not use placeholders as labels.

[ghost]

Hi @RebeccaAnne. We have acknowledged this issue report. Please continue to follow this issue for updates/progress/questions.