Outdated Wrangler KV namespace creation command in README

[aayushpagare21-compcoder]

The README.md file contains an outdated command for creating a KV namespace using Wrangler:

npx wrangler kv:namespace create "WORKER_MAPPINGS"

This syntax with colons (kv:namespace) is deprecated. Since Wrangler version 3.60.0, the correct syntax is:

npx wrangler kv namespace create "WORKER_MAPPINGS"

Steps to Reproduce

• Follow the getting started guide in README.md.
• Run the command in step 4.
• Encounter an "Unknown arguments" error because the command is invalid.

Expected Behavior

• The command should work without errors.

Actual Behavior

• Wrangler throws an error: [ERROR] Unknown arguments: kv:namespace, create, WORKER_MAPPINGS

Environment

• Wrangler version: 4.38.0 (and above)
• OS: macOS (and others)

Fix

• Update the command in README.md to use the new syntax.