Remove --category option from C3 docs because it does not work

[irvinebroque]

> npm create cloudflare -- --category web-framework
.......

Unrecognized option: category

https://developers.cloudflare.com/pages/get-started/c3/#cli-arguments

https://github.com/cloudflare/workers-sdk/blob/6cac35131c0bdf93995f317b977cfdb2e9a4902c/packages/create-cloudflare/src/templates.ts#L233-L235

[cloudflare-workers-and-pages]

Deploying cloudflare-docs with    Cloudflare Pages

Latest commit:	861fc46
Status:	✅  Deploy successful!
Preview URL:	https://bfe67302.cloudflare-docs-7ou.pages.dev
Branch Preview URL:	https://bib-y-u-no-category.cloudflare-docs-7ou.pages.dev

View logs

[github-actions]

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/pages/get-started/c3/	https://bib-y-u-no-category.cloudflare-docs-7ou.pages.dev/pages/get-started/c3/