feat(swiftpm): update completion for Swift 5.7 (#11299)

* feat(swiftpm): update completion for Swift 5.7

* chore(docs): fix typo

plugins/swiftpm/README.md

@@ -2,7 +2,7 @@
 
 ## Description
 
-This plugin provides a few utilities that make you faster on your daily work with the [Swift Package Manager](https://github.com/apple/swift-package-manager), as well as autocompletion for Swift 5.1.
+This plugin provides a few utilities that make you faster on your daily work with the [Swift Package Manager](https://github.com/apple/swift-package-manager), as well as autocompletion for Swift 5.7.
 
 To start using it, add the `swiftpm` plugin to your `plugins` array in `~/.zshrc`: