Update docs markdown file weight to make it clear (#23909)

For Docusaurus, it needs a meta data named `sidebar_position`, so we
copy all `weight` under `menu/sidebar` as top meta key.

docs/content/doc/packages/swift.en-us.md

@@ -2,6 +2,7 @@
 date: "2023-01-10T00:00:00+00:00"
 title: "Swift Packages Repository"
 slug: "usage/packages/swift"
+weight: 95
 draft: false
 toc: false
 menu: