typo fixes

Author: Alexander Furer

grpc-spring-boot-starter-demo/src/test/java/org/lognet/springboot/grpc/TestConfig.java

@@ -37,7 +37,7 @@ public ServerCall.Listener answer(InvocationOnMock invocation) throws Throwable
 
     @Bean
     @Profile("customServerBuilder")
-    public GRpcServerBuilderConfigurer grpcServerWithPredefinedPortConfigurer(){
+    public GRpcServerBuilderConfigurer customGrpcServerBuilderConfigurer(){
         return  new GRpcServerBuilderConfigurer(){
             @Override
             public ServerBuilder<?> configure(ServerBuilder<?> serverBuilder){