Bump spring-boot-dependencies from 2.6.3 to 2.6.6 (#815)

Bumps [spring-boot-dependencies](https://github.com/spring-projects/spring-boot) from 2.6.3 to 2.6.6.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.6.3...v2.6.6)

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

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

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

Author: dependabot[bot]

pom.xml

@@ -139,7 +139,7 @@
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
-                <version>2.6.3</version>
+                <version>2.6.6</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>