Update helium-swift SDK to 4.5.4

[github-actions]

Automated update of helium-swift SDK dependency to version 4.5.4.

Changes:

• Updated podspec dependency version
• Bumped package.json version (patch increment)

This PR was automatically created by the iOS SDK release workflow.

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Note

Low Risk
Dependency and version metadata only; no application logic or API surface changes in this repo.

Overview
Automated release alignment: bumps the iOS Helium CocoaPods dependency from 4.3.0 to 4.5.4 in PaywallSdkReactNative.podspec, and increments the npm package version 3.0.23 → 3.0.24 in package.json.

No React Native bridge or TypeScript source changes—consumers get the newer native paywall SDK when they run pod install / update the package.

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