Update link_template for Swift in sdks.yaml

The link to `https://awslabs.github.io/aws-sdk-swift/reference/0.x` in the existing template is a 404. Fixed to https://github.com/awslabs/aws-sdk-swift, which is a current Swift SDK.

Author: AMZ-brandon

aws_doc_sdk_examples_tools/config/sdks.yaml

@@ -317,7 +317,7 @@ Swift:
       api_ref:
         uid: "SdkForSwift"
         name: "&guide-swift-api;"
-        link_template: "https://awslabs.github.io/aws-sdk-swift/reference/0.x"
+        link_template: "https://github.com/awslabs/aws-sdk-swift"
   guide: "&guide-swift-dev;"
 CLI:
   property: cli