build(deps): bump spring-boot-starter-parent

Bumps [spring-boot-starter-parent](https://github.com/spring-projects/spring-boot) from 2.1.3.RELEASE to 2.7.3.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.1.3.RELEASE...v2.7.3)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

hibernate-search/hsearch-elasticsearch-wikipedia/pom.xml

@@ -15,7 +15,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.1.3.RELEASE</version>
+		<version>2.7.3</version>
 	</parent>
 
 	<properties>