Bump springDocVersion from 2.5.0 to 2.6.0

Bumps `springDocVersion` from 2.5.0 to 2.6.0.

Updates `org.springdoc:springdoc-openapi-starter-webmvc-ui` from 2.5.0 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@v2.5.0...v2.6.0)

Updates `org.springdoc:springdoc-openapi-starter-common` from 2.5.0 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@v2.5.0...v2.6.0)

Updates `org.springdoc:springdoc-openapi-starter-webmvc-api` from 2.5.0 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@v2.5.0...v2.6.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

build.gradle

@@ -33,7 +33,7 @@ plugins {
 ext {
     // versions of dependencies
     springBootVersion = '3.1.0'
-    springDocVersion  = '2.5.0'
+    springDocVersion  = '2.6.0'
     javersVersion     = '7.5.0'
 }