fix(deps): update spring boot to v4

Author: renovate[bot]

code-conversion/patterns/code-examples/camunda-7/pom.xml

@@ -19,7 +19,7 @@
       <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-dependencies</artifactId>
-        <version>3.5.9</version>
+        <version>4.0.1</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
@@ -78,7 +78,7 @@
       <plugin>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-maven-plugin</artifactId>
-        <version>3.5.9</version>
+        <version>4.0.1</version>
       </plugin>
     </plugins>
   </build>

code-conversion/patterns/code-examples/camunda-8/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>3.5.9</version>
+		<version>4.0.1</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>io.camunda.conversion</groupId>

diagram-converter/pom.xml

@@ -30,7 +30,7 @@
     <version.checker-qual>3.53.0</version.checker-qual>
     <version.commons-collections4>4.5.0</version.commons-collections4>
     <!-- Spring Boot 4 upgrade is blocked by C7 April Environment Release -->
-    <version.spring-boot>3.5.9</version.spring-boot>
+    <version.spring-boot>4.0.1</version.spring-boot>
     <plugin.version.spotless-maven-plugin>3.1.0</plugin.version.spotless-maven-plugin>
     <plugin.version.maven-site-plugin>3.21.0</plugin.version.maven-site-plugin>
     <plugin.version.maven-assembly-plugin>3.8.0</plugin.version.maven-assembly-plugin>