Typos a/an (#13876)

bundles/org.openhab.binding.yamahareceiver/src/main/java/org/openhab/binding/yamahareceiver/internal/handler/YamahaZoneThingHandler.java

@@ -81,7 +81,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
- * The {@link YamahaZoneThingHandler} is managing one zone of an Yamaha AVR.
+ * The {@link YamahaZoneThingHandler} is managing one zone of a Yamaha AVR.
  * It has a state consisting of the zone, the current input ID, {@link ZoneControlState}
  * and some more state objects and uses the zone control protocol
  * class {@link ZoneControlXML}, {@link InputWithPlayControlXML} and {@link InputWithNavigationControlXML}

bundles/org.openhab.binding.yamahareceiver/src/test/java/org/openhab/binding/yamahareceiver/internal/YamahaReceiverHandlerTest.java

@@ -88,7 +88,7 @@ public class YamahaReceiverHandlerTest extends AbstractXMLProtocolTest {
     public void afterInitializeBridgeShouldBeOnline() throws InterruptedException {
         // when
         subject.initialize();
-        // internally there is an timer, let's allow it to execute
+        // internally there is a timer, let's allow it to execute
         Thread.sleep(200);
 
         // then