Add missed paren in comment.

(cherry picked master -> v1.0 from commit aefbbad)

src/System.Diagnostics.Process/tests/ProcessTest_ConsoleApp/ProcessTest_ConsoleApp.cs

@@ -14,7 +14,7 @@ static int Main(string[] args)
                     if (args[0].Equals("infinite"))
                     {
                         // To avoid potential issues with orphaned processes (say, the test exits before
-                        // exiting the process, we'll say "infinite" is actually 30 seconds.
+                        // exiting the process), we'll say "infinite" is actually 30 seconds.
 
                         Console.WriteLine("ProcessTest_ConsoleApp.exe started with an endless loop");
                         Thread.Sleep(30 * 1000);