change: [M3-8614] - Update Image Upload dropzone copy as part of Image Service Gen2

[bnussman-akamai]

Description 📝

Makes some minor copy updates and UI tweaks on the Image Upload page based on UX's request 🎨

Preview 📷

Before	After

How to test 🧪

• Go to http://localhost:3000/images/create/upload
• Check UI and verify the changes make logical sense 🧠
• Check copy for spelling ✏️
• Check for any UI regressions 👁️

As an Author I have considered 🤔

• 👀 Doing a self review
• ❔ Our contribution guidelines
• 🤏 Splitting feature into small PRs
• ➕ Adding a changeset
• 🧪 Providing/Improving test coverage
• 🔐 Removing all sensitive information from the code and PR description
• 🚩 Using a feature flag to protect the release
• 👣 Providing comprehensive reproduction steps
• 📑 Providing or updating our documentation
• 🕛 Scheduling a pair reviewing session
• 📱 Providing mobile support
• ♿ Providing accessibility support

[github-actions]

Coverage Report: ✅
Base Coverage: 87.13%
Current Coverage: 87.13%

[cpathipa]

Confirming on the copy updates.
No regressions found around image uplaod.

[carrillo-erik]

Since this PR is dealing with copy updates, I feel that the price shown below the header should be updated to reflect the pricing format ($#.##) found in our Plans tables. Everything else looks good.

[bnussman-akamai]

Good call @carrillo-erik

The technical writer and UX were cool with that change. Done in 1f92539