Update yarn.py (#66973)

##### SUMMARY
To globally install from local node.js library. Prepend "file:" to the path of the node.js library.


##### ISSUE TYPE
- Docs Pull Request

+label: docsite_pr
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Bryan Black 2020-02-11 07:19:30 -08:00 committed by GitHub
parent 3b67e75562
commit 2c7623c6cc
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@ -29,6 +29,7 @@ options:
description:
- The name of a node.js library to install
- If omitted all packages in package.json are installed.
- To globally install from local node.js library. Prepend "file:" to the path of the node.js library.
required: false
path:
description: