gradle-dressca-backend: bump org.springframework.boot:spring-boot-sta…

…rter-security

Bumps [org.springframework.boot:spring-boot-starter-security](https://github.com/spring-projects/spring-boot) from 3.4.1 to 3.4.3.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.4.1...v3.4.3)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter-security
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

samples/web-csr/dressca-backend/dependencies.gradle

@@ -14,7 +14,7 @@ ext {
     springdocOpenapiVersion = "2.8.1"
     servletApiVersion = "6.1.0"
     commonsLangVersion = "3.17.0"
-    springSecurity = "3.4.1"
+    springSecurity = "3.4.3"
 
     supportDependencies = [
         spring_boot_starter : "org.springframework.boot:spring-boot-starter",