Bump spring-boot to 3.5.12

https://github.com/spring-projects/spring-boot/releases/tag/v3.5.12

Signed-off-by: Ivan Hrasko <ivan.hrasko@pantheon.tech>
(cherry picked from commit 9fab116)

Author: ihrasko

lighty-core/lighty-controller-spring-di/pom.xml

@@ -27,7 +27,7 @@
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
-                <version>3.5.11</version>
+                <version>3.5.12</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>

lighty-examples/lighty-controller-springboot-netconf/pom.xml

@@ -11,7 +11,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.5.11</version>
+        <version>3.5.12</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>