Bump org.springframework.graphql:spring-graphql from 1.2.5 to 1.2.6

Bumps [org.springframework.graphql:spring-graphql](https://github.com/spring-projects/spring-graphql) from 1.2.5 to 1.2.6.
- [Release notes](https://github.com/spring-projects/spring-graphql/releases)
- [Commits](https://github.com/spring-projects/spring-graphql/compare/v1.2.5...v1.2.6)

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

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

build.gradle

@@ -109,7 +109,7 @@ ext {
     smackVersion = '4.4.7'
     springAmqpVersion = '3.1.3'
     springDataVersion = '2023.1.4'
-    springGraphqlVersion = '1.2.5'
+    springGraphqlVersion = '1.2.6'
     springKafkaVersion = '3.1.3'
     springRetryVersion = '2.0.5'
     springSecurityVersion = '6.2.3'