Bump flamingo.version from 5.8.14 to 5.9.1

Bumps `flamingo.version` from 5.8.14 to 5.9.1.

Updates `org.flamingo-mc:viewer` from 5.8.14 to 5.9.1
- [Release notes](https://github.com/flamingo-mc/flamingo/releases)
- [Commits](B3Partners/tailormap@v5.8.14...v5.9.1)

Updates `org.flamingo-mc:viewer-admin` from 5.8.14 to 5.9.1
- [Release notes](https://github.com/flamingo-mc/flamingo/releases)
- [Commits](B3Partners/tailormap@v5.8.14...v5.9.1)

Updates `org.flamingo-mc:viewer-config-persistence` from 5.8.14 to 5.9.1
- [Release notes](https://github.com/flamingo-mc/flamingo/releases)
- [Commits](B3Partners/tailormap@v5.8.14...v5.9.1)

---
updated-dependencies:
- dependency-name: org.flamingo-mc:viewer
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.flamingo-mc:viewer-admin
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.flamingo-mc:viewer-config-persistence
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -14,7 +14,7 @@
     </parent>
     <properties>
         <java.version>1.8</java.version>
-        <flamingo.version>5.8.14</flamingo.version>
+        <flamingo.version>5.9.1</flamingo.version>
         <project.build.sourceVersion>1.8</project.build.sourceVersion>
         <project.build.targetVersion>1.8</project.build.targetVersion>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>