Docugami docs: First cell should be a title cell

[eyurtsev]

Make first cell a title in docugami docs

This makes the first cell a title cell in docugami notebook

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[eyurtsev]

@hwchase17 feel free to merge whenever

[tjaffri]

Sorry about this, guys... I usually put the loader magics on top of every notebook as a matter of habit.

[eyurtsev]

no worries @tjaffri