docs: use relative URLs in more places (#22516)

docs/usage/configuration-options.md

docs/usage/dependency-pinning.md

docs/usage/docker.md

docs/usage/faq.md

docs/usage/getting-started/private-packages.md

docs/usage/getting-started/use-cases.md

docs/usage/golang.md

docs/usage/java.md

docs/usage/key-concepts/automerge.md

docs/usage/key-concepts/dashboard.md

docs/usage/key-concepts/scheduling.md

docs/usage/node.md

docs/usage/noise-reduction.md

docs/usage/php.md

docs/usage/self-hosted-configuration.md

docs/usage/templates.md

docs/usage/user-stories/swissquote.md