[mqtt] Fix typos in action label (openhab#18116)

Signed-off-by: Jimmy Tanagra <[email protected]>

Author: jimtng

bundles/org.openhab.binding.mqtt/src/main/java/org/openhab/binding/mqtt/internal/action/MQTTActions.java

@@ -59,7 +59,7 @@ public void publishMQTT(
     public void publishMQTT(
             @ActionInput(name = "topic", label = "@text/actionInputTopicLabel", description = "@text/actionInputTopicDesc") @Nullable final String topic,
             @ActionInput(name = "value", label = "@text/actionInputValueLabel", description = "@text/actionInputValueDesc") @Nullable final String value,
-            @ActionInput(name = "retain", label = "@text/actionInputRetainlabel", description = "@text/actionInputRetainDesc") @Nullable final Boolean retain) {
+            @ActionInput(name = "retain", label = "@text/actionInputRetainLabel", description = "@text/actionInputRetainDesc") @Nullable final Boolean retain) {
         if (value == null) {
             logger.debug("skipping MQTT publishing to topic '{}' due to null value.", topic);
             return;
@@ -78,7 +78,7 @@ public void publishMQTT(
     public void publishMQTT(
             @ActionInput(name = "topic", label = "@text/actionInputTopicLabel", description = "@text/actionInputTopicDesc") @Nullable final String topic,
             @ActionInput(name = "value", label = "@text/actionInputValueLabel", description = "@text/actionInputValueDesc") final byte[] value,
-            @ActionInput(name = "retain", label = "@text/actionInputRetainlabel", description = "@text/actionInputRetainDesc") @Nullable final Boolean retain) {
+            @ActionInput(name = "retain", label = "@text/actionInputRetainLabel", description = "@text/actionInputRetainDesc") @Nullable final Boolean retain) {
         AbstractBrokerHandler brokerHandler = handler;
         if (brokerHandler == null) {
             logger.warn("MQTT Action service ThingHandler is null!");