fix javadoc

Author: chickenlj

agentscope-examples/harness-examples/harness-example-local/src/main/java/io/agentscope/harness/example/WorkspaceInitializer.java

@@ -38,7 +38,7 @@
  * the JAR. When the example is run for the first time, {@link #init(Path)} extracts them into the
  * given workspace directory so the agent can read and modify them at runtime.
  *
- * <h3>Workspace structure</h3>
+ * Workspace structure:
  *
  * <pre>
  * &lt;workspace&gt;/

agentscope-examples/harness-examples/harness-quickstart/src/main/java/io/agentscope/harness/example/WorkspaceInitializer.java

@@ -38,7 +38,7 @@
  * the JAR. When the example is run for the first time, {@link #init(Path)} extracts them into the
  * given workspace directory so the agent can read and modify them at runtime.
  *
- * <h3>Workspace structure</h3>
+ * Workspace structure:
  *
  * <pre>
  * &lt;workspace&gt;/