LG-8297: Capitalize "Example" hint labels

[aduth]

🎫 Ticket

LG-8297

🛠 Summary of changes

Reverts the change in #7330 which revised the hint label from capitalized "Example" to lower-case "example".

Related discussion:

• LG-7393 Two-Screen Phone Verification (WIP) #7330 (comment)
• https://gsa-tts.slack.com/archives/CNCGEHG1G/p1670252355858679

📜 Testing Plan

• Check that every hint label in the application uses "Example" upper-case (e.g. IdV phone step)

👀 Screenshots

Before	After

[benjaminchait]

@aduth - Forgive me, I don't know if the IDP has different files for (1) the hybrid flow handoff telephone input and (2) the SSN input. Would your changes cover all of those screens, or just the ones here for (3) phone verification?

[aduth]

@aduth - Forgive me, I don't know if the IDP has different files for (1) the hybrid flow handoff telephone input and (2) the SSN input. Would your changes cover all of those screens, or just the ones here for (3) phone verification?

This would cover most of the screens (all of the ones affected in the prior pull request). There's other strings which also use similar hint text, but those are already capitalized as expected (e.g. the "Memorable Date" component).

[eric-gade]

lgtm