deps: update dependency org.springframework.boot:spring-boot-starter-web to v2.5.6 (#616)

* deps: update dependency org.springframework.boot:spring-boot-starter-web to v2.5.6 * 🦉 Updates from OwlBot See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: renovate-bot

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

@@ -100,7 +100,7 @@
  <dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
- <version>2.5.5</version>
+ <version>2.5.6</version>
  </dependency>
  <dependency>
  <groupId>org.springframework.boot</groupId>