chore: release 0.7.4

[eszlamczyk]

What/Why?

Bumps the package version on main to 0.7.4 to match the published release.

0.7.4 was cut as a scoped hotfix from the 0.7.3 tag (0.7.4-stable branch = 0.7.3 + the #527 iOS x86_64 simulator fix) and is already published to npm (latest). The fix itself is already on main via #531 — this PR only carries the package.json version bump so main reflects the released version.

• package.json: 0.7.3 → 0.7.4 (cherry-pick of the release bump commit)
• No code changes; the x86_64 fix is already on main.

Testing

• 0.7.4 verified end-to-end from the npm registry in a clean consumer project: npm install react-native-enriched-markdown@0.7.4 → pod install → universal-simulator Release build succeeds (the iOS RaTeX math dependency breaks x86_64 simulator builds in react-native-enriched-markdown >= 0.7 #527 scenario).

PR Checklist

• Code compiles and runs on iOS
• Code compiles and runs on Android
• Updated documentation/README if applicable
• Ran example app to verify changes
• E2E tests are passing
• Required E2E tests have been added (if applicable)