fix(das_backend): update dependency org.springframework.boot:spring-b…

…oot-starter-parent to v3.4.3 (#608)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

das_backend/pom.xml

@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>3.4.2</version>
+		<version>3.4.3</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>ch.sbb</groupId>