springbootdemo: fix httpcore5 version mismatch, fix rsync comment

- httpcore5: 5.3.3 → 5.4.1 in both poms (must match httpcore5-h2 and
  httpclient5 minor version; mixing 5.3.x core with 5.4.x client/h2 can
  cause runtime ClassNotFoundException)
- wildfly pom XML comment: replace rsync command with README reference;
  the '--delete' flag is XML-illegal inside <!-- --> (double-dash), and
  the workaround of '-delete' is incorrect rsync syntax

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: robertlazarski

modules/samples/userguide/src/userguide/springbootdemo-tomcat11/pom.xml

@@ -300,7 +300,7 @@
 	<dependency>
             <groupId>org.apache.httpcomponents.core5</groupId>
             <artifactId>httpcore5</artifactId>
-            <version>5.3.3</version>
+            <version>5.4.1</version>
         </dependency>
         <dependency>
             <groupId>org.apache.httpcomponents.client5</groupId>

modules/samples/userguide/src/userguide/springbootdemo-wildfly/pom.xml

@@ -30,8 +30,7 @@
     src/main/webapp/WEB-INF/jboss-web.xml
 
   Build:   mvn package -DskipTests
-  Deploy:  rsync -a -delete target/deploy/axis2-json-api/ ~/wildfly/standalone/deployments/axis2-json-api.war/
-           touch ~/wildfly/standalone/deployments/axis2-json-api.war.dodeploy
+  Deploy:  see README.md (rsync + touch .dodeploy)
   JDK:     Compiled at Java 21 source level; tested on OpenJDK 21 and OpenJDK 25.
 -->
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
@@ -311,7 +310,7 @@
         <dependency>
             <groupId>org.apache.httpcomponents.core5</groupId>
             <artifactId>httpcore5</artifactId>
-            <version>5.3.3</version>
+            <version>5.4.1</version>
         </dependency>
         <dependency>
             <groupId>org.apache.httpcomponents.client5</groupId>