Update docfx.json

[lindalu-MSFT]

Ran json through several linter/validater tools and the code is valid. Might be the a "carriage return" at the end was one suggestion from Stack Overflow. Delete line 54

[opbld31]

Docs Build status updates of commit c9ff383:

❌ Validation status: errors

Please follow instructions here which may help to resolve issue.

File	Status	Preview URL	Details
docs/docfx.json	❌Error		Details

docs/docfx.json

• Line 55, Column 0: [Error-json-syntax-error] Unexpected end of content while loading JObject.

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