Stencil: docs-json file nested using fully qualified path within the dist folder

[dancork]

Describe the bug
The docs-json output target file is being nested deeply in the outputPath.

To Reproduce
Steps to reproduce the behavior:

Create nx project with stencil lib using the following:

• nx v15.9.4
• @nxext/stencil v16.3.0
• @stencil/core v3.4.0

Add docs-json output taget to stencil.config.ts

{
  type: 'docs-json',
  file: 'dist/docs.json',
  typesFile: null,
}

Use @nxext/stencil:build executor

Should see deeply nested docs.json

Expected behavior
File should created relative to the outputPath property in project.json