Polish "Improve handling of non-standard status codes in RestTemplate metrics"

See gh-17991

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/web/client/RestTemplateExchangeTagsTests.java

@@ -95,7 +95,7 @@ class RestTemplateExchangeTagsTests {
 	}
 
 	@Test
-	void outcomeTagIsClientErrorWhenResponseIsNonStandardInKnownSeries() throws IOException {
+	void outcomeTagIsClientErrorWhenResponseIsNonStandardInClientSeries() throws IOException {
 		ClientHttpResponse response = mock(ClientHttpResponse.class);
 		given(response.getRawStatusCode()).willReturn(490);
 		Tag tag = RestTemplateExchangeTags.outcome(response);

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/web/reactive/client/WebClientExchangeTagsTests.java

@@ -148,7 +148,7 @@ class WebClientExchangeTagsTests {
 	}
 
 	@Test
-	void outcomeTagIsClientErrorWhenResponseIsNonStandardInKnownSeries() {
+	void outcomeTagIsClientErrorWhenResponseIsNonStandardInClientSeries() {
 		given(this.response.rawStatusCode()).willReturn(490);
 		Tag tag = WebClientExchangeTags.outcome(this.response);
 		assertThat(tag.getValue()).isEqualTo("CLIENT_ERROR");