#7975 Update "Getting Started" guide link (#7985)

Update the "Getting Started" guide link.

### Motivation:

The README for this project was using an outdated link to the "Getting
Started" page on swift.org

### Modifications:

Updated the link

### Result:

Link now points to the correct page

Author: JacobHearst

README.md

@@ -23,7 +23,7 @@ The [SourceKit-LSP](https://github.com/swiftlang/sourcekit-lsp) project leverage
 
 ## Getting Started
 
-Please use [this guide](https://swift.org/getting-started/#using-the-package-manager) for learning package manager basics.
+Please use [this guide](https://www.swift.org/documentation/package-manager/) for learning package manager basics.
 
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