Fix getter/setter for transport property.

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/otlp/OtlpProperties.java

@@ -75,11 +75,11 @@ public void setTimeout(Duration timeout) {
 		this.timeout = timeout;
 	}
 
-	public Transport getExporter() {
+	public Transport getTransport() {
 		return this.transport;
 	}
 
-	public void setExporter(Transport transport) {
+	public void setTransport(Transport transport) {
 		this.transport = transport;
 	}