spring-tools/vscode-extensions/vscode-spring-boot/properties-support/spring-boot-properties.tmLanguage.json

{
  "name": "Spring Boot Properties",
  "scopeName": "source.spring-boot-properties",
  "patterns": [
    {
      "comment": "source.java-properties is defined in vscode-java",
      "include": "source.java-properties"
    }
  ]
}