Merge pull request #2652 from ahoppen/6.0/radix-sendable

[6.0] Mark `IntegerLiteralExprSyntax.Radix` as `Sendable`

Author: ahoppen

Sources/SwiftRefactor/IntegerLiteralUtilities.swift

@@ -17,7 +17,7 @@ import SwiftSyntax
 #endif
 
 extension IntegerLiteralExprSyntax {
-  public enum Radix {
+  public enum Radix: Sendable {
     case binary
     case octal
     case decimal