Bump org.springframework.boot from 2.5.12 to 2.7.3

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 2.5.12 to 2.7.3.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.5.12...v2.7.3)

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

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

Author: dependabot[bot]

build.gradle.kts

@@ -13,7 +13,7 @@ repositories {
 
 plugins {
     id("org.jetbrains.kotlin.jvm") version "1.7.10"
-    id("org.springframework.boot") version "2.5.12"
+    id("org.springframework.boot") version "2.7.3"
     id("org.jetbrains.kotlin.plugin.spring") version "1.7.10"
     id("org.jetbrains.kotlin.plugin.jpa") version "1.7.10"
     idea