Use new milestone for Spring AI

Author: sualeh

schemacrawler-ai-mcpserver/pom.xml

@@ -45,7 +45,7 @@
       <dependency>
         <groupId>org.springframework.ai</groupId>
         <artifactId>spring-ai-bom</artifactId>
-        <version>1.1.0-M3</version>
+        <version>1.1.0-M4</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>