The closure isn't the only place the continuation can be called.

Per tech review from @jckarter

Author: amartini51

stdlib/public/Concurrency/CheckedContinuation.swift

@@ -260,7 +260,7 @@ extension CheckedContinuation {
 ///     source for the continuation, used to identify the continuation in
 ///     runtime diagnostics related to misuse of this continuation.
 ///   - body: A closure that takes an `UnsafeContinuation` parameter.
-///     The closure must resume the continuation exactly once.
+///     You must resume the continuation exactly once.
 @available(SwiftStdlib 5.5, *)
 public func withCheckedContinuation<T>(
     function: String = #function,
@@ -279,7 +279,7 @@ public func withCheckedContinuation<T>(
 ///     source for the continuation, used to identify the continuation in
 ///     runtime diagnostics related to misuse of this continuation.
 ///   - body: A closure that takes an `UnsafeContinuation` parameter.
-///     The closure must resume the continuation exactly once.
+///     You must resume the continuation exactly once.
 ///
 /// If `resume(throwing:)` is called on the continuation,
 /// this method thows that error.

stdlib/public/Concurrency/PartialAsyncTask.swift

@@ -239,7 +239,7 @@ internal func _resumeUnsafeThrowingContinuationWithError<T>(
 /// then calls the given closure with the an unsafe continuation for the current task.
 ///
 /// - Parameter fn: A closure that takes an `UnsafeContinuation` parameter.
-/// The closure must resume the continuation exactly once.
+/// You must resume the continuation exactly once.
 ///
 /// - Returns: The value passed to the continuation by the closure.
 ///
@@ -259,7 +259,7 @@ public func withUnsafeContinuation<T>(
 /// then calls the given closure with the an unsafe throwing continuation for the current task.
 ///
 /// - Parameter fn: A closure that takes an `UnsafeContinuation` parameter.
-/// The closure must resume the continuation exactly once.
+/// You must resume the continuation exactly once.
 ///
 /// - Returns: The value passed to the continuation by the closure.
 @available(SwiftStdlib 5.5, *)