chore(audiobookshelf): bump chart and app versions

Update Audiobookshelf Helm chart version from 1.11.0 to 1.11.1 and
 application version from 2.30.0 to 2.31.0. This ensures the chart
 references the latest available application version with its new features
 and bug fixes. Regular version maintenance keeps the deployment current
 with upstream changes.

charts/audiobookshelf/Chart.yaml

@@ -2,8 +2,8 @@ apiVersion: v2
 name: audiobookshelf
 description: A Helm chart for Audiobookshelf
 type: application
-version: 1.11.0
-appVersion: "2.30.0"
+version: 1.11.1
+appVersion: "2.31.0"
 home: https://git.cooltux.net/marko/HelmChartSammlung/src/branch/main/charts/audiobookshelf
 keywords:
   - audiobookshelf