upgraded spring-boot to 3.5.5

Author: rmmayo

backend/pom.xml

@@ -18,10 +18,6 @@
         <commons.text>1.10.0</commons.text>
         <gmavenplus.plugin.version>2.1.0</gmavenplus.plugin.version>
         <java.version>19</java.version>
-
-        <!--  TODO: Temporary override spring boot versions, remove once spring boot upgrades these versions -->
-        <spring-framework.version>6.2.8</spring-framework.version>
-        <tomcat.version>10.1.42</tomcat.version>
     </properties>
 
     <dependencies>