fix(test): correct version in McpClientBuilderTest to match project version

Update X-Client-Version from 1.0.8 to 1.0.10-SNAPSHOT to align with
current project version defined in pom.xml.

Author: Alexxigang

agentscope-core/src/test/java/io/agentscope/core/tool/mcp/McpClientBuilderTest.java

@@ -1135,7 +1135,7 @@ void testCustomizeStreamableHttpClient_WithHttp2() {
     void testCompleteConfiguration_WithClientCustomization() {
         Map<String, String> headers = new HashMap<>();
         headers.put("Authorization", "Bearer token123");
-        headers.put("X-Client-Version", "1.0.8");
+        headers.put("X-Client-Version", "1.0.10-SNAPSHOT");
 
         Map<String, String> queryParams = new HashMap<>();
         queryParams.put("tenant", "acme");