docs: Fix spelling errors across various pages on the site (#18533)
This commit fixes numerous spelling errors across the site and also
removes unnecessary whitespace that was present in the edited files.
Co-authored-by: Blake Covarrubias <blake@covarrubi.as>
* Fix API GW broken link
* Update website/content/docs/api-gateway/upgrades.mdx
Co-authored-by: Tu Nguyen <im2nguyen@users.noreply.github.com>
---------
Co-authored-by: Tu Nguyen <im2nguyen@users.noreply.github.com>
* Update existing docs from Consul API Gateway -> API Gateway for Kubernetes
* Update page header to reflect page title change
* Update nav title to match new page title
docs(capigw): add manual ReferencePolicy -> ReferenceGrant migration steps, comment out kube-storage-version-migrator workflow in case we choose to publish it later