Update dependency GraphQL.Server.Ui.Playground to v7

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
GraphQL.Server.Ui.Playground	nuget	major	6.1.1 -> 7.0.0

---

Release Notes

graphql-dotnet/server

v7.0.0

Compare Source

What's New

• Entirely new implementation of WebSocket / subscription support
• Support for newer graphql-ws WebSocket protocol
• Support for authorization over WebSocket connections
• Refactored implementation of ASP.NET Core middleware for better extensibility
• Support for the application/graphql+json media type
• Support for ASP.NET Core 2.1 running on .NET Framework 4.8 or .NET Core 2.1
• Entirely new authorization rule with support for AllowAnonymous and role-based rules
• Support for endpoint authorization rules
• Configuration simplified to a single line of code
• New readme with much better instructions and usage notes
• Many new samples added, such as usage with JWT Bearer tokens
• Reduced dependencies on third-party packages
• Many new options for configuration of GraphQL endpoint
• NRT annotations and rewritten XML comments throughout

⚠️ Note that authorization rules on input types are ignored in v7 ⚠️

See Migrating from 6.x to 7.x for detailed migration notes.

Full Changelog: graphql-dotnet/server@6.1.1...7.0.0

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, click this checkbox.

---

This PR has been generated by Mend Renovate. View repository job log here.