fix(deps): update spring boot to v3.5.6

Author: renovate[bot]

spring-oracle-example/pom.xml

@@ -7,7 +7,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>3.5.5</version>
+		<version>3.5.6</version>
 		<relativePath/>
 	</parent>
 
@@ -19,7 +19,7 @@
 
 	<properties>
 		<java.version>21</java.version>
-        <spring.boot.version>3.5.5</spring.boot.version>
+        <spring.boot.version>3.5.6</spring.boot.version>
         <lombok.version>1.18.42</lombok.version>
         <oracle.database.version>23.7.0.25.01</oracle.database.version>
         <maven.compiler.plugin.version>3.14.0</maven.compiler.plugin.version>