[stable/mongodb] Fix primary statefulset when existing secret is provided (#9122)

Signed-off-by: András Tóth <andras.toth93@gmail.com>

stable/mongodb/Chart.yaml

@@ -1,5 +1,5 @@
 name: mongodb
-version: 4.8.2
+version: 4.8.3
 appVersion: 4.0.3
 description: NoSQL document-oriented database that stores JSON-like documents with dynamic schemas, simplifying the integration of data in content-driven applications.
 keywords:

stable/mongodb/templates/statefulset-primary-rs.yaml

@@ -77,7 +77,7 @@ spec:
           - name: MONGODB_DATABASE
             value: {{ .Values.mongodbDatabase | quote }}
             {{- if .Values.usePassword }}
-            {{- if .Values.mongodbPassword }}
+            {{- if or .Values.mongodbPassword .Values.existingSecret }}
           - name: MONGODB_PASSWORD
             valueFrom:
               secretKeyRef: