Fix whitespace

Author: grynspan

stdlib/public/Concurrency/PartialAsyncTask.swift

@@ -37,7 +37,7 @@ public struct UnsafeContinuation<T> {
 extension UnsafeContinuation where T == Void {
   @inlinable
   public func resume() {
-      self.resume(returning: ())
+    self.resume(returning: ())
   }
 }
 
@@ -68,7 +68,7 @@ public struct UnsafeThrowingContinuation<T> {
 extension UnsafeThrowingContinuation where T == Void {
   @inlinable
   public func resume() {
-      self.resume(returning: ())
+    self.resume(returning: ())
   }
 }