Revert "chore: update spring-boot to 3.4.3 (#21023) (#21027)" (#21043) (#21045)

This reverts commit a5929bd.

Co-authored-by: Mikhail Shabarov <[email protected]>

Author: vaadin-bot

pom.xml

@@ -85,7 +85,7 @@
         <failOnMissingWebXml>false</failOnMissingWebXml>
 
         <!-- Dependencies -->
-        <spring.boot.version>3.4.3</spring.boot.version>
+        <spring.boot.version>3.4.2</spring.boot.version>
         <gwt.version>2.9.0</gwt.version>
         <hibernate.validator.version>8.0.1.Final</hibernate.validator.version>
         <slf4j.version>2.0.16</slf4j.version>