Fixed typo in javadocs.

Closes failsafe-lib#338

Author: jhalterman

core/src/main/java/dev/failsafe/Timeout.java

@@ -35,7 +35,7 @@
  * handlers can be used to handle a timeout being exceeded or not.
  * </p>
  * <p>Note: {@link TimeoutBuilder#withInterrupt() interruption} will have no effect when performing an {@link
- * FailsafeExecutor#getAsyncExecution(AsyncRunnable) async execution} since the async thread is unkown to Failsafe.</p>
+ * FailsafeExecutor#getAsyncExecution(AsyncRunnable) async execution} since the async thread is unknown to Failsafe.</p>
  * <p>
  * This class is threadsafe.
  * </p>

core/src/main/java/dev/failsafe/TimeoutBuilder.java

@@ -57,7 +57,7 @@ public Timeout<R> build() {
    * Note: Only configure interrupts if the code being executed is designed to be interrupted.
    * <p>
    * <p>Note: interruption will have no effect when performing an {@link
-   * FailsafeExecutor#getAsyncExecution(AsyncRunnable) async execution} since the async thread is unkown to
+   * FailsafeExecutor#getAsyncExecution(AsyncRunnable) async execution} since the async thread is unknown to
    * Failsafe.</p>
    */
   public TimeoutBuilder<R> withInterrupt() {