feat: Update examples to cover pg-native integration usage.

[onurtemizkan]

Ref: getsentry/sentry-javascript#3894

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[AbhiPrasad]

We need to make sure we update the Supported packages and their integration name: section as well. Maybe add a note that it is new with version XXX (not sure what will be until we cut the sdk release)

[onurtemizkan]

@AbhiPrasad, I added a note to mention the released version of this feature.