fix(deps): update dependency org.springframework.boot:spring-boot-starter-parent to v2.7.4

pom.xml

@@ -7,7 +7,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.7.3</version>
+        <version>2.7.4</version>
     </parent>
 
     <groupId>cz.metacentrum.perun</groupId>