fix: correct deliberate typo 'catagory' to 'category' (fixes #7)

[aipd506]

Summary of Changes

Fixes #7 by correcting the planted spelling error in site/helloworld.html:

• Changed catagory to category in the 'Things you could build' section describing the product catalog.

[HealthyMeats]

Thanks, this is the right fix, and you found the second seed within hours of it being planted.

CI is red on one step and it is not your code: 7 of the 8 gates passed. The failure is our Developer Certificate of Origin check, which needs a Signed-off-by: line on the commit.

git commit --amend -s
git push --force-with-lease

That is the only change needed. CI will run automatically on the push, no approval wait this time.

[aipd506]

Amended commit with Developer Certificate of Origin (Signed-off-by: aipd506 <piedra.alberto.d@gmail.com>) and force-pushed. Thank you @HealthyMeats for the quick review and guidance!