Update :servlet:spring-boot:java:observability to 7

servlet/spring-boot/java/observability/gradle.properties

@@ -1,4 +1,4 @@
 version=6.1.1
-spring-security.version=6.5.0-SNAPSHOT
+spring-security.version=7.0.0-SNAPSHOT
 org.gradle.jvmargs=-Xmx6g -XX:+HeapDumpOnOutOfMemoryError
 org.gradle.caching=true

servlet/spring-boot/java/observability/src/integTest/java/example/HelloObservabilityApplicationITests.java

@@ -23,7 +23,7 @@ import org.junit.jupiter.api.Test;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.web.server.test.client.TestRestTemplate;
 import org.springframework.http.HttpEntity;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;