chore: Peer review suggested changes to clean up typos and naming issues.

Author: scottmarchant

Tests/DispatchAsyncTests/AsyncSemaphoreTests.swift

@@ -18,7 +18,7 @@ import Testing
 
 nonisolated(unsafe) private var sharedPoolCompletionCount = 0
 
-@Suite("DispatchGroup Tests")
+@Suite("AsyncSemaphore Tests")
 class AsyncSemaphoreTests {
     @available(macOS 13, iOS 16, tvOS 16, watchOS 9, *)
     @Test(.timeLimit(.minutes(1)))

Tests/DispatchAsyncTests/DispatchPingPongTests.swift

@@ -17,7 +17,7 @@ import Testing
 
 private typealias DispatchQueue = DispatchAsync.DispatchQueue
 
-/// Ping-Pong queue test  is adapted from the test
+/// Ping-Pong queue test is adapted from the test
 /// [dispatch_pingpong.c in libdispatch](https://github.com/swiftlang/swift-corelibs-libdispatch/blob/main/tests/dispatch_pingpong.c).
 ///
 /// Two queues recursively schedule work on each other N times. The test