docs(analyzer): Rename Swift package manager to SwiftPM

Use the official project name as listed on the project website [1]. This
was already updated in the README in 578af02.

[1]: https://www.swift.org/package-manager

Signed-off-by: Martin Nonnenmacher <martin.nonnenmacher@bosch.io>

website/docs/tools/analyzer.md

@@ -52,7 +52,7 @@ supported:
     [no `cartfile.private`](https://github.com/oss-review-toolkit/ort/issues/3774))
   * [CocoaPods](https://github.com/CocoaPods/CocoaPods) (limitations:
     [no custom source repositories](https://github.com/oss-review-toolkit/ort/issues/4188))
-  * [Swift Package Manager](https://www.swift.org/package-manager)
+  * [SwiftPM](https://www.swift.org/package-manager)
 * PHP
   * [Composer](https://getcomposer.org/)
 * Python