deps: update dependency org.springframework.boot:spring-boot-starter-thymeleaf to v2.5.4

Author: renovate-bot

samples/snippets/cloud-client/src/pom.xml

@@ -111,7 +111,7 @@
  <dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-thymeleaf</artifactId>
- <version>2.5.2</version>
+ <version>2.5.4</version>
  </dependency>
  <dependency>
  <groupId>net.bytebuddy</groupId>