Self-reference of schema files

[tats-u]

Describe the bug

https://github.com/tats-u/vscode-yaml-bug

Expected Behavior

Self-reference does not occur in schema files.

Current Behavior

Steps to Reproduce

1. Create a YAML schema
2. Create a YAML using the schema and add # yaml-language-server: $schema=[the relative path of 1.] to the first line
3. Open the schema that has been created in 1.

Environment

• [x] Windows
• [ ] Mac
• [ ] Linux
• [ ] other (please specify)

[corneliusroemer]

Duplicate of #477

[tats-u]

Thank you for suggesting a heavily related issue, but it is not completely duplicated to mine because it does not use the special comment but uses the project config.