Bump hashicorp/google-beta from 7.5.0 to 7.6.0 in /infra/tf (#177)

Bumps [hashicorp/google-beta](https://github.com/hashicorp/terraform-provider-google-beta) from 7.5.0 to 7.6.0.
- [Release notes](https://github.com/hashicorp/terraform-provider-google-beta/releases)
- [Changelog](https://github.com/hashicorp/terraform-provider-google-beta/blob/main/CHANGELOG.md)
- [Commits](hashicorp/terraform-provider-google-beta@v7.5.0...v7.6.0)

---
updated-dependencies:
- dependency-name: hashicorp/google-beta
  dependency-version: 7.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]