build(deps): bump springdoc.version from 2.7.0 to 2.8.1

Bumps `springdoc.version` from 2.7.0 to 2.8.1.

Updates `org.springdoc:springdoc-openapi-starter-webmvc-ui` from 2.7.0 to 2.8.1
- [Release notes](https://github.com/springdoc/springdoc-openapi/releases)
- [Changelog](https://github.com/springdoc/springdoc-openapi/blob/main/CHANGELOG.md)
- [Commits](springdoc/springdoc-openapi@v2.7.0...v2.8.1)

Updates `org.springdoc:springdoc-openapi-starter-common` from 2.7.0 to 2.8.1
- [Release notes](https://github.com/springdoc/springdoc-openapi/releases)
- [Changelog](https://github.com/springdoc/springdoc-openapi/blob/main/CHANGELOG.md)
- [Commits](springdoc/springdoc-openapi@v2.7.0...v2.8.1)

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

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

pom.xml

@@ -59,7 +59,7 @@
         <spring-boot.version>3.2.5</spring-boot.version>
         <kotlin.version>2.1.0</kotlin.version>
         <kotlin.coroutines.version>1.8.1</kotlin.coroutines.version>
-        <springdoc.version>2.7.0</springdoc.version>
+        <springdoc.version>2.8.1</springdoc.version>
         <nv-i18n.version>1.29</nv-i18n.version>
         <kotlin-logging.version>3.0.5</kotlin-logging.version>
         <common-csv.version>1.12.0</common-csv.version>