Fix typo in registry self-signed certs guide

[hasheddan]

Description of your changes

Fixes a typo of Configure in the registry self-signed certs guide.

Signed-off-by: hasheddan georgedanielmangum@gmail.com

I have:

• Read and followed Crossplane's contribution process.
• Run make reviewable to ensure this PR is ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary.

How has this code been tested

n/a -- docs

[hasheddan]

@jbw976 hmm interesting 🤔 looks like your review doesn't actually allow for merge since the steering group isn't in the codeowners here -- I'm going to see if I can update.

[hasheddan]

Actually, I think this may be working as intended. docs is falling through to the fallback, which is crossplane/reviewers or crossplane/maintainers. It probably makes sense for the steering committee to not be getting assigned to random reviews, and it looks like the crossplane/steering-committee assigns all three members. However, I do wonder if some steering committee members who also want to be more active in reviewing (i.e. maybe @jbw976) should be added to the crossplane/maintainers group as well?

[github-actions]

Successfully created backport PR #3254 for release-1.7.

[github-actions]

Successfully created backport PR #3255 for release-1.8.

[github-actions]

Successfully created backport PR #3256 for release-1.9.

[jbw976]

I do wonder if some steering committee members who also want to be more active in reviewing (i.e. maybe @jbw976) should be added to the crossplane/maintainers group as well?

I'll try to earn it back over the next few months as I get more involved with community/reviews 💪 🙇‍♂️