Fix Micrometer tag providers after HttpStatus changes

Since SPR-16898, `HttpStatus.toString()` has changed and we should
instead rely on `HttpStatus.value()` to get the HTTP status number.

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

@@ -83,7 +83,7 @@ public final class WebClientExchangeTags {
 	 * @return the status tag
 	 */
 	public static Tag status(ClientResponse response) {
-		return Tag.of("status", response.statusCode().toString());
+		return Tag.of("status", String.valueOf(response.statusCode().value()));
 	}
 
 	/**

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/reactive/server/WebFluxTags.java

@@ -69,7 +69,7 @@ public final class WebFluxTags {
 		if (status == null) {
 			status = HttpStatus.OK;
 		}
-		return Tag.of("status", status.toString());
+		return Tag.of("status", String.valueOf(status.value()));
 	}
 
 	/**