Fix all Vale errors

[jbw976]

This PR fixes all 674 errors from Vale that I could find by running the tooling locally, as described in the contributing guide:
https://docs.crossplane.io/contribute/vale/

❯ vale --config="utils/vale/.vale.ini" content/
... <warnings omitted> ...
✖ 0 errors, 1525 warnings and 0 suggestions in 194 files.

Hopefully, this clean and error free slate will improve the contributor experience so that when folks submit their own PRs they are only faced with Vale errors that they have introduced.

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[jbw976]

lol Vale, I see you don't want to go down without a fight! ⚔️ 🛡️
https://github.com/crossplane/docs/actions/runs/10783172908/job/29904534358?pr=810

✖ 12 errors, 1544 warnings and 0 suggestions in 44 files.

[jbw976]

Ah nice, after bumping Value to v3.7.1 in CI, it also now reports 0 errors:

✖ 0 errors, 1524 warnings and 0 suggestions in 45 files.