fix(ui): Appendix K Form, Instructions, and Modal Design Updates

[tbolt]

🎫 Linked Ticket

Closes OY2-31581

💬 Description / Notes

• Updates "Appendix K" -> "1915(c) Appendix K" in various locations with App-K related forms. Including instructions and modal.
• See original ticket for full list of changes

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	74.66%	6042 / 8092
🔵	Statements	73.94%	6368 / 8612
🔵	Functions	68.41%	1802 / 2634
🔵	Branches	42.75%	1177 / 2753

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
react-app/src/features/forms/post-submission/respond-to-rai/index.tsx	70%	50%	50%	70%	18, 48, 76
react-app/src/features/forms/post-submission/upload-subsequent-documents/index.tsx	72.72%	53.84%	88.88%	72.72%	22, 64, 72-83, 146
react-app/src/features/forms/post-submission/withdraw-package/index.tsx	38.46%	0%	33.33%	38.46%	8-44, 96, 144
react-app/src/features/forms/post-submission/withdraw-rai/index.tsx	100%	33.33%	100%	100%

Generated in workflow #1109 for commit 1f28219 by the Vitest Coverage Report Action

[asharonbaltazar]

Left some nits, but do you think a function that formats 1915(c) to 1915(c) Appendix K would save some repetition?

[tbolt]

@asharonbaltazar Updated to address your feedback. For you question on how repetitive that format will be, I don't know. Based on your knowledge do you think it's something we should abstract into a utility or something like that?

[github-actions]

🎉 This PR is included in version 1.5.0-val.98 🎉

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