chore(deps): Update Terraform terraform-google-modules/vpc-service-controls/google to v6

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This PR contains the following updates:

Package	Type	Update	Change
terraform-google-modules/vpc-service-controls/google (source)	module	major	~> 5.0 -> ~> 6.0

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Release Notes

terraform-google-modules/terraform-google-vpc-service-controls (terraform-google-modules/vpc-service-controls/google)

### [`v6.0.0`](https://togithub.com/terraform-google-modules/terraform-google-vpc-service-controls/blob/HEAD/CHANGELOG.md#600-2024-04-11) [Compare Source](https://togithub.com/terraform-google-modules/terraform-google-vpc-service-controls/compare/v5.2.1...v6.0.0) ##### ⚠ BREAKING CHANGES - **TPG>=5.4:** add vpc_network_sources in access level ([#​133](https://togithub.com/terraform-google-modules/terraform-google-vpc-service-controls/issues/133)) - **TPG >= 4.68:** added missing features for egress policies ([#​131](https://togithub.com/terraform-google-modules/terraform-google-vpc-service-controls/issues/131)) ##### Features - **TPG>=5.4:** add vpc_network_sources in access level ([#​133](https://togithub.com/terraform-google-modules/terraform-google-vpc-service-controls/issues/133)) ([de58006](https://togithub.com/terraform-google-modules/terraform-google-vpc-service-controls/commit/de58006f7f9913568b2c6bede71f02b696d515e9)) ##### Bug Fixes - **TPG >= 4.68:** added missing features for egress policies ([#​131](https://togithub.com/terraform-google-modules/terraform-google-vpc-service-controls/issues/131)) ([c6df326](https://togithub.com/terraform-google-modules/terraform-google-vpc-service-controls/commit/c6df32651832ea4c9f82e432c8119216a027f1b0))

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