Update helium-swift SDK to 4.5.3

[github-actions]

Automated update of helium-swift SDK dependency to version 4.5.3.

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 version pin and patch package bump only; no bridge or application logic changes in this PR.

Overview
Bumps the iOS CocoaPods dependency on native Helium from 4.3.0 to 4.5.3 in PaywallSdkReactNative.podspec, so React Native iOS builds pull the newer helium-swift release.

Releases the npm package as 3.0.24 (patch bump from 3.0.23). No JS/TS or Android Gradle changes in this diff—only the podspec pin and package version, consistent with the automated iOS SDK release workflow.

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