Capitalization and typo fix

[GomezAdalyn]

1. Fix TypeScript capitalization in the Related Repos list. (“Typescript” → “TypeScript”)

2. Improve wording in the CLI description (“Polymarkets” → “Polymarket”)

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Note

Fix README wording: change “Polymarkets” to “Polymarket” in CLI description and “Typescript” to “TypeScript” in Related Repos.

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