[stable/joomla] Change regex looking for rolling tags (#14255)

Signed-off-by: Carlos Rodriguez Hernandez <crhernandez@bitnami.com>

stable/joomla/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: joomla
-version: 4.2.3
+version: 4.2.4
 appVersion: 3.9.6
 description: PHP content management system (CMS) for publishing web content
 keywords:

stable/joomla/templates/NOTES.txt

@@ -60,7 +60,7 @@ host. To configure Joomla! to use and external database host:
 
 {{- end }}
 
-{{- if and (contains "bitnami/" .Values.image.repository) (not (.Values.image.tag | regexFind "-r\\d+$")) }}
+{{- if and (contains "bitnami/" .Values.image.repository) (not (.Values.image.tag | toString | regexFind "-r\\d+$|sha256:")) }}
 
 WARNING: Rolling tag detected ({{ .Values.image.repository }}:{{ .Values.image.tag }}), please note that it is strongly recommended to avoid using rolling tags in a production environment.
 +info https://docs.bitnami.com/containers/how-to/understand-rolling-tags-containers/