Bump spring-boot-gradle-plugin from 2.7.2 to 2.7.3 (Netflix#3193)

Bumps [spring-boot-gradle-plugin](https://github.com/spring-projects/spring-boot) from 2.7.2 to 2.7.3.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.2...v2.7.3)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle

@@ -9,7 +9,7 @@ buildscript {
     }
     dependencies {
         classpath 'com.netflix.nebula:gradle-extra-configurations-plugin:7.0.0'
-        classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.7.2'
+        classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.7.3'
         classpath 'com.diffplug.spotless:spotless-plugin-gradle:6.+'
     }
 }