Upgrade terraform-provider-newrelic to v3.70.6 (#1187)

This PR was generated via `$ upgrade-provider pulumi/pulumi-newrelic
--kind=provider --target-bridge-version=latest --target-version=3.70.6
--allow-missing-docs=true`.

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- Upgrading terraform-provider-newrelic from 3.70.5  to 3.70.6.
	Fixes #1186

Author: pulumi-bot