Update swift-syntax links to swiftlang/swift-syntax (#503)

Author: ahoppen

Package.swift

@@ -33,7 +33,7 @@ let package = Package(
   ],
 
   dependencies: [
-    .package(url: "https://github.com/apple/swift-syntax.git", from: "600.0.0-latest"),
+    .package(url: "https://github.com/swiftlang/swift-syntax.git", from: "600.0.0-latest"),
   ],
 
   targets: [

Sources/TestingMacros/CMakeLists.txt

@@ -28,7 +28,7 @@ if(NOT SwiftSyntax_FOUND)
   set(FETCHCONTENT_BASE_DIR ${CMAKE_BINARY_DIR}/_d)
   # TODO: Update GIT_TAG to the 6.0 release tag once it is available.
   FetchContent_Declare(SwiftSyntax
-    GIT_REPOSITORY https://github.com/apple/swift-syntax
+    GIT_REPOSITORY https://github.com/swiftlang/swift-syntax
     GIT_TAG 27b74edd5de625d0e399869a5af08f1501af8837)
   FetchContent_MakeAvailable(SwiftSyntax)
 endif()

Sources/TestingMacros/Support/Additions/TokenSyntaxAdditions.swift

@@ -14,7 +14,7 @@ extension TokenSyntax {
   /// The text of this instance with all backticks removed.
   ///
   /// - Bug: This property works around the presence of backticks in `text.`
-  ///   ([swift-syntax-#1936](https://github.com/apple/swift-syntax/issues/1936))
+  ///   ([swift-syntax-#1936](https://github.com/swiftlang/swift-syntax/issues/1936))
   var textWithoutBackticks: String {
     text.filter { $0 != "`" }
   }

Sources/TestingMacros/Support/Argument.swift

@@ -18,7 +18,7 @@ import SwiftSyntax
 /// - Bug: This type is needed because trimming a syntax node or copying it into
 ///   another node erases its source location information, so we cannot convert
 ///   expressions to `LabeledExprSyntax` instances until we no longer need that
-///   information. ([swift-syntax-#1961](https://github.com/apple/swift-syntax/issues/1961))
+///   information. ([swift-syntax-#1961](https://github.com/swiftlang/swift-syntax/issues/1961))
 struct Argument {
   /// The argument's label, if present.
   var label: TokenSyntax?