api: rename getOverhead to getOverheadText

runelite-api/src/main/java/net/runelite/api/Actor.java

@@ -238,5 +238,5 @@ public interface Actor extends Renderable
 	 *
 	 * @return the overhead text
 	 */
-	String getOverhead();
+	String getOverheadText();
 }

runescape-api/src/main/java/net/runelite/rs/api/RSActor.java

@@ -34,7 +34,7 @@ public interface RSActor extends RSRenderable, Actor
 
 	@Import("overhead")
 	@Override
-	String getOverhead();
+	String getOverheadText();
 
 	@Import("x")
 	int getX();