Upgrade Winstone from 6.7 to 6.10 (#7632)

* Upgrade Winstone to 6.10

* Fixed up comment

pom.xml

@@ -98,7 +98,8 @@ THE SOFTWARE.
     <antlr.version>4.11.1</antlr.version>
     <bridge-method-injector.version>1.25</bridge-method-injector.version>
     <spotless.version>2.31.0</spotless.version>
-    <winstone.version>6.7</winstone.version>
+    <!-- Make sure to keep the jetty-maven-plugin version in war/pom.xml in sync with the Jetty release in Winstone: -->
+    <winstone.version>6.10</winstone.version>
   </properties>
 
   <!--

war/pom.xml

@@ -145,7 +145,6 @@ THE SOFTWARE.
       -->
       <groupId>org.jenkins-ci</groupId>
       <artifactId>winstone</artifactId>
-      <!-- Make sure to keep jetty-maven-plugin elsewhere in this file in sync with the Jetty release in Winstone -->
       <version>${winstone.version}</version>
       <scope>test</scope>
     </dependency>