Update spring boot to v2.7.18

Author: renovate[bot]

cxf-spring-boot-starter-samples/cxf-boot-simple-client/pom.xml

@@ -13,7 +13,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.5.6</version>
+        <version>2.7.18</version>
     </parent>
 
     <properties>

cxf-spring-boot-starter-samples/cxf-boot-simple/pom.xml

@@ -14,7 +14,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.5.6</version>
+        <version>2.7.18</version>
     </parent>
 
     <properties>

cxf-spring-boot-starter/pom.xml

@@ -18,7 +18,7 @@
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
 		<!-- Project dependencies -->
-		<spring.boot.version>2.7.5</spring.boot.version>
+		<spring.boot.version>2.7.18</spring.boot.version>
 		<cxf-spring-boot-starter-maven-plugin.version>2.3.0.RELEASE</cxf-spring-boot-starter-maven-plugin.version>
 		<cxf.version>3.5.4</cxf.version>
 		<jakarta.activation.version>2.0.1</jakarta.activation.version>