Bump spring-boot-starter-parent from 2.6.6 to 2.6.7

Bumps [spring-boot-starter-parent](https://github.com/spring-projects/spring-boot) from 2.6.6 to 2.6.7.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/compare/v2.6.6...v2.6.7)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter-parent
  dependency-type: direct:production
  update-type: version-update:semver-patch
...
Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -8,7 +8,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.6.6</version>
+        <version>2.6.7</version>
     </parent>
 
     <groupId>com.schbrain.framework</groupId>