Action Required: Fix Renovate Configuration

There is an error with this repository's Renovate configuration that needs to be fixed. As a precaution, Renovate will stop PRs until it is resolved.

Location: `.github/renovate.json`
Error type: The Renovate configuration file contains some invalid settings
Message: The following managers configured in enabledManagers are not supported: "dotnet-sdk"

Open `.github/renovate.json` and inspect the `enabledManagers` setting, then compare its entries with Renovate's supported managers. Validate the configuration with Renovate or the repository's existing checks; done means the unsupported `dotnet-sdk` manager error is gone and Renovate can resume creating PRs.

Written by the indexing model from the issue text.