Update dependency org.springframework.restdocs:spring-restdocs-mockmvc to v3.0.4

Author: renovate[bot]

build.gradle

@@ -101,7 +101,7 @@ dependencies {
     //driver for h2
     implementation "com.h2database:h2:2.3.232"
 
-    testImplementation "org.springframework.restdocs:spring-restdocs-mockmvc:3.0.3"
+    testImplementation "org.springframework.restdocs:spring-restdocs-mockmvc:3.0.4"
     testImplementation "org.springframework.boot:spring-boot-starter-test"
     testImplementation "org.springframework:spring-test"
     testImplementation "org.springframework.security:spring-security-test"