Updated spring-boot and springdoc versions

The updated versions should fix CVE-2024-45801.
Was forced to update spring-boot 3.4.1 to be able to use the latest version of springdoc as per the
springdoc compability matrix.

pom.xml

@@ -39,6 +39,8 @@
         <jersey.version>3.1.6</jersey.version>
         <poi.version>5.2.5</poi.version>
         <jackson.version>2.17.0</jackson.version>
+        <spring.boot.version>3.4.1</spring.boot.version>
+        <springdoc.openapi.version>2.8.3</springdoc.openapi.version>
 
         <!-- Database stuff -->
         <database.showSql>false</database.showSql>
@@ -100,7 +102,7 @@
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
-                <version>3.2.12</version>
+                <version>${spring.boot.version}</version>
                 <scope>import</scope>
                 <type>pom</type>
             </dependency>
@@ -261,7 +263,7 @@
             <dependency>
                 <groupId>org.springdoc</groupId>
                 <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
-                <version>2.5.0</version>
+                <version>${springdoc.openapi.version}</version>
             </dependency>
         </dependencies>
     </dependencyManagement>