fix(deps): update spring boot to v2.7.15

Author: renovate[bot]

build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version '2.6.6'
+    id 'org.springframework.boot' version '2.7.15'
     id 'io.spring.dependency-management' version '1.0.11.RELEASE'
     id 'java'
 }
@@ -16,7 +16,7 @@ dependencies {
     runtimeOnly 'com.h2database:h2'
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
     // spring boot mongodb
-    implementation group: 'org.springframework.boot', name: 'spring-boot-starter-data-mongodb', version: '2.6.6'
+    implementation group: 'org.springframework.boot', name: 'spring-boot-starter-data-mongodb', version: '2.7.15'
 
     // swagger
     implementation group: 'org.springdoc', name: 'springdoc-openapi-ui', version: '1.6.7'