corrected bad quotes in CoreV1Api.md

[Hellfire01]

In the readme a few quotes where written as " and interpreted as such rather than the intended '
This causes them to be displayed incorrectly.
Note that the issue is also possibly in other files, I have only checked this one

What type of PR is this?

/kind documentation

What this PR does / why we need it:

Simply improves readability of the README document

Special notes for your reviewer:

There are possibly more issues like this one, especially if a tool is used for the generation of the documentation and is not configured correctly

Does this PR introduce a user-facing change?

No

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Adding the "do-not-merge/release-note-label-needed" label because no release-note block was detected, please follow our release note process to remove it.

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[linux-foundation-easycla]

• ✅login: Hellfire01 / (6f4ed51)

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