Fixed a typo of the deprecated tag

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@269935 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/Exec.java

@@ -71,7 +71,7 @@ import java.io.InputStreamReader;
  * @author duncan@x180.com
  * @author rubys@us.ibm.com
  *
- * @deprected Instead of using this class, please extend ExecTask or
+ * @deprecated Instead of using this class, please extend ExecTask or
  * delegate to Execute.  
  */
 public class Exec extends Task {