Typos upadated in TF doc

[sushreebarsa]

Description

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[gbaned]

Hi @saberkun, @lehougoogle, @rachellj218 Can you please review this PR ? Thank you!

[gbaned]

Hi @Chen-Zhe Can you please review this PR ? Thank you!

[laxmareddyp]

Closing this PR as these changes submitted through internal CL