docs: fix typos

[false200]

Description

Fixes #854

This PR fixes a batch of small typos and one broken link across the documentation. Nothing functional changed, just spelling, grammar, and a bad urunit URL that pointed nowhere.

Changes include fixing "handing" to "handling", "same directly" to "same directory", "Except of" to "Except for", "unitest" to "unittest", and "email At" to "email at".

How was this tested?

Docs only change. I read through each edited file to confirm the fixes look correct in context. No code or runtime behavior was touched so e2e tests were not run.

LLM usage

N/A

Checklist

• I have read the contribution guide.
• The linter passes locally (make lint).
• The e2e tests of at least one tool pass locally (make test_ctr, make test_nerdctl, make test_docker, make test_crictl).
• If LLMs were used: I have read the llm policy.

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[cmainas]

This PR does not have a reference issue therefore we will not take it into account.

[false200]

This PR does not have a reference issue therefore we will not take it into account.

Alright, I'll create an issue and link to it, I thought that minor typos doesn't require creating an issue.

[false200]

I have created an issue and updated the pr, happy to have it reviewed maintainers.

[Nachiket-Roy]

Duplicate #833

[false200]

Duplicate #833

Thanks for reporting it.