Update dependency org.springframework.boot:spring-boot-starter-parent to v3.5.6

Author: renovate[bot]

pom.xml

@@ -8,7 +8,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.3.1</version>
+        <version>3.5.6</version>
     </parent>
 
     <groupId>org.example</groupId>