fix(ci): Fix update-sentry-native-ndk script to work with libs.versions.toml

[romtsn]

#skip-changelog

📜 Description

• The script has been failing after migrating to libs.versions.toml, so this fixes it

💡 Motivation and Context

💚 How did you test it?

Manually ran update-sentry-native-ndk.sh set-version 0.8.5 and get-version

📝 Checklist

• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps