Updated the Gradle file to match the pom file

Dave Syer made a change that I inadvertently trampled. I have restored that change. Sorry, Dave.

complete/build.gradle

@@ -18,7 +18,7 @@ dependencies {
 	implementation 'org.webjars:sockjs-client:1.0.2'
 	implementation 'org.webjars:stomp-websocket:2.3.3'
 	implementation 'org.webjars:bootstrap:3.3.7'
-	implementation 'org.webjars:jquery:3.1.0'
+	implementation 'org.webjars:jquery:3.1.1-1'
 	testImplementation('org.springframework.boot:spring-boot-starter-test') {
 		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
 	}