fix(values.yaml): update to write filesystem permission to create dump.sql.gz (#47)

Author: Franck-Sorel

charts/pgdump-backup/values.yaml

@@ -36,7 +36,7 @@ app-template:
             pullPolicy: IfNotPresent
           securityContext:
             allowPrivilegeEscalation: false
-            readOnlyRootFilesystem: true
+            readOnlyRootFilesystem: false
             capabilities:
               drop:
                 - ALL