reduce visibility

Author: zeitlinger

instrumentation/spring/spring-boot-autoconfigure/src/main/java/io/opentelemetry/instrumentation/spring/autoconfigure/OpenTelemetryAutoConfiguration.java

@@ -59,7 +59,7 @@ public OpenTelemetryAutoConfiguration() {}
 
   @Bean
   @ConfigurationPropertiesBinding
-  public OtelMapConverter otelMapConverter() {
+  OtelMapConverter otelMapConverter() {
     // This is needed for otlp exporter headers and OtelResourceProperties.
 
     // We need this converter, even if the SDK is disabled,