Bump org.yaml:snakeyaml from 2.5 to 2.6

Bumps [org.yaml:snakeyaml](https://bitbucket.org/snakeyaml/snakeyaml) from 2.5 to 2.6.
- [Commits](https://bitbucket.org/snakeyaml/snakeyaml/branches/compare/snakeyaml-2.6..snakeyaml-2.5)

---
updated-dependencies:
- dependency-name: org.yaml:snakeyaml
  dependency-version: '2.6'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

bom/build.gradle

@@ -121,7 +121,7 @@ ext {
 //    TODO: jacksonjdk8Version = '2.18.2'monday - failed at runtime
     springdocStarterVersion = '2.2.0'
     jacocoVersion = '0.8.8'
-    snakeYamlVersion = '2.5'
+    snakeYamlVersion = '2.6'
 }
 
 dependencies {