chore(deps): bump org.springframework.boot:spring-boot-starter-thymeleaf

Bumps [org.springframework.boot:spring-boot-starter-thymeleaf](https:/spring-projects/spring-boot) from 3.3.2 to 3.3.4.
- [Release notes](https:/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.3.2...v3.3.4)

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

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

backend/pom.xml

@@ -89,7 +89,7 @@
  <dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-thymeleaf</artifactId>
- <version>3.3.2</version>
+ <version>3.3.4</version>
  </dependency>
  <dependency>
  <groupId>com.bucket4j</groupId>