build(deps): bump springdoc.version from 2.1.0 to 2.6.0

Bumps `springdoc.version` from 2.1.0 to 2.6.0.

Updates `org.springdoc:springdoc-openapi-starter-webmvc-api` from 2.1.0 to 2.6.0
- [Release notes](https://github.com/springdoc/springdoc-openapi/releases)
- [Changelog](https://github.com/springdoc/springdoc-openapi/blob/main/CHANGELOG.md)
- [Commits](springdoc/springdoc-openapi@v2.1.0...v2.6.0)

Updates `org.springdoc:springdoc-openapi-starter-webmvc-ui` from 2.1.0 to 2.6.0
- [Release notes](https://github.com/springdoc/springdoc-openapi/releases)
- [Changelog](https://github.com/springdoc/springdoc-openapi/blob/main/CHANGELOG.md)
- [Commits](springdoc/springdoc-openapi@v2.1.0...v2.6.0)

---
updated-dependencies:
- dependency-name: org.springdoc:springdoc-openapi-starter-webmvc-api
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.springdoc:springdoc-openapi-starter-webmvc-ui
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

activiti-cloud-service-common/pom.xml

@@ -41,7 +41,7 @@
     <java-semver.version>0.9.0</java-semver.version>
     <resteasy.version>6.2.10.Final</resteasy.version>
     <logstash.version>8.0</logstash.version>
-    <springdoc.version>2.1.0</springdoc.version>
+    <springdoc.version>2.6.0</springdoc.version>
     <swagger.version>2.2.22</swagger.version>
     <xstream.version>1.4.20</xstream.version>
     <json-unit.version>3.5.0</json-unit.version>