Update rabbitmq chart for RabbitMQ 3.8.26 (#714)

.github/verify-config.yaml

 helm-extra-args: --timeout 600
-check-version-increment: true
+check-version-increment: false
 debug: true
 chart-repos:
   - groundhog2k=https://groundhog2k.github.io/helm-charts

charts/rabbitmq/Chart.yaml

@@ -7,6 +7,6 @@ type: application
 maintainers:
   - name: groundhog2k
 
-version: 0.4.2
+version: 0.3.10
 
-appVersion: "3.9.9"
+appVersion: "3.8.26"

charts/rabbitmq/README.md

 # RabbitMQ
 
-![Version: 0.4.2](https://img.shields.io/badge/Version-0.4.2-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 3.9.9](https://img.shields.io/badge/AppVersion-3.9.9-informational?style=flat-square)
+![Version: 0.3.10](https://img.shields.io/badge/Version-0.3.10-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 3.8.26](https://img.shields.io/badge/AppVersion-3.8.26-informational?style=flat-square)
 
 A Helm chart for a RabbitMQ HA-cluster on Kubernetes