KEP-4330: match beta goal version ranges to version ranges in beta graduation criteria (N-3)

[zjs]

• One-line PR description: Correct typos in goals section.

• Issue link: Introduce compatibility version for Kubernetes control-plane upgrades #4330

• Other comments: The beta graduation criteria express a wider range of support for the compatibility and emulation versions (N-3 minor versions) than the beta portion of the goals section (N-1 minor versions). The content of other sections, including the example in Feature Gate Lifecycles, and the discussion in KEP-4330: Compatibility versions #4395 suggests N-3 was intended. Fix for clarity.

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[siyuanfoundation]

/lgtm
Thanks for fixing this error!