fix(eso): chart 0.6.1 - fullnameOverride to keep SA names stable

The ESO subchart was prefixing the ServiceAccount with the parent
release name (qsoft-platform-external-secrets), breaking both
ClusterSecretStore.serviceAccountRef and OpenBao's role binding which
both expect plain 'external-secrets'. Lock the name via
fullnameOverride.

Chart.yaml

@@ -23,8 +23,8 @@ description: |
       Git).
 
 type: application
-version: 0.6.0
-appVersion: "0.6.0"
+version: 0.6.1
+appVersion: "0.6.1"
 
 dependencies:
   - name: cert-manager