Update Terraform vultr to v2.21.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
vultr (source)	required_provider	minor	2.19.0 -> 2.21.0

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Release Notes

vultr/terraform-provider-vultr (vultr)

v2.21.0

Compare Source

Enhancements

• resource/container_registry: add resource support PR 445
• resource/container_registry: add registry name validation PR 493
• data_source/container_registry: add data source support PR 493
• resource/user: change ACL schema to set to state drift PR 495
• resource/inference: add resource PR 501
• data_source/inference: add data source PR 501

Deprecations

• resource/private_network: removed from provider PR 496
• data_source/private_network: removed from provider PR 496

Dependencies

• Bump golang.org/x/oauth2 from 0.20.0 to 0.21.0 PR 497
• Update govultr from v2.7.0 to v2.8.1 PR 500

Automation

• Lint fixes; add an updated lint configuration PR 498

New Contributors

• @​im6h made their first contribution in PR 445
• @​F21 made their first contribution in PR 495

v2.20.1

Compare Source

Automation

• Update GPG import github action PR 491

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