Ranges for JSON paths with escaped slashes are incorrect

[P0lip]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce

1. Given this OpenAPI document

{
  "openapi": "3.0.0",
  "info": {
    "title": "Foo",
    "version": "1.0"
  },
  "servers": [
    {
      "url": "http://localhost:3000"
    }
  ],
  "paths": {
    "/users": {
      "get": {
        "summary": "Your GET endpoint",
        "tags": [],
        "responses": {}
      }
    }
  },
  "components": {
    "schemas": {}
  }
}

2. The following range is produced for oas3-schema error

{
  "end": {
    "character": 23,
    "line": 16
  },
  "start": {
    "character": 10,
    "line": 11
  }
}

Expected behavior
The following range is generated:

{
  "end": {
    "character": 23,
    "line": 16
  },
  "start": {
    "character": 20,
    "line": 16
  }
}