Update to com.squareup.okhttp3:4.9.3

Closes gh-755

dependencies/spring-authorization-server-dependencies.gradle

@@ -16,8 +16,8 @@ dependencies {
 		api "junit:junit:4.13.2"
 		api "org.assertj:assertj-core:3.22.0"
 		api "org.mockito:mockito-core:4.5.1"
-		api "com.squareup.okhttp3:mockwebserver:3.14.9"
-		api "com.squareup.okhttp3:okhttp:3.14.9"
+		api "com.squareup.okhttp3:mockwebserver:4.9.3"
+		api "com.squareup.okhttp3:okhttp:4.9.3"
 		api "com.jayway.jsonpath:json-path:2.7.0"
 		api "org.hsqldb:hsqldb:2.6.1"
 	}