Fix duplicate words and minor grammar typos in documentation

[pranavchoudhary-tech]

This PR fixes a few minor duplicate word typos (like the the and pod pod) and grammatical errors that I found in the English documentation.

Fixes #56544

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[dipesh-rawat]

/lgtm

[kubernetes-prow]

LGTM label has been added.

Details

Git tree hash: e6e372215adcf6b6d02d8ce21a6d813db596af13

[Arhell]

Lgtm

[stmcginnis]

Thanks @pranavchoudhary-tech! If there are any other things in this file that can be improved while you're already making edits, that would be great to include. But this looks great.

/lgtm

[kubernetes-prow]

New changes are detected. LGTM label has been removed.

[kubernetes-prow]

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[pranavchoudhary-tech]

@stmcginnis Thanks for the review and the /lgtm! I took your advice and did a quick scan through the same three files. I found a few more minor grammatical errors and duplicate words (like pod pod) and bundled those fixes into this PR as well!