Fix spelling in documentation and top-level files

[kjpark]

What this PR does / why we need it:

I found a typo in the docs while reading, thought I'd fix a few others while at it. improves readability / documentation quality.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation only

Which issue/s this PR fixes

How Has This Been Tested?

no code files changed, only text. nothing will break, changes have been reviewed programmatically and manually.

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added tests to cover my changes.
• All new and existing tests passed.

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Jedidiah Park (f5cf9bd, 710091d)

[k8s-ci-robot]

@kjpark: This issue is currently awaiting triage.

If Ingress contributors determines this is a relevant issue, they will accept it by applying the triage/accepted label and provide further guidance.

The triage/accepted label can be added by org members by writing /triage accepted in a comment.

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[k8s-ci-robot]

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[k8s-ci-robot]

Hi @kjpark. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[tao12345666333]

Thanks

/ok-to-test

[longwuyuan]

/lgtm
@strongjz @rikatz

[longwuyuan]

/approve

[longwuyuan]

/assign @rikatz

[tao12345666333]

/lgtm

[rikatz]

/approve

Thanks!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kjpark, longwuyuan, rikatz, tao12345666333

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files:

• OWNERS [rikatz]

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