build(playground-server): downgrade jakarta.servlet-api to 5.0.0

Author: lzwjava

playground-server/pom.xml

@@ -82,7 +82,7 @@
         <dependency>
             <groupId>jakarta.servlet</groupId>
             <artifactId>jakarta.servlet-api</artifactId>
-            <version>6.1.0</version>
+            <version>5.0.0</version>
             <scope>provided</scope>
         </dependency>
         <dependency>