fix incorrect tag for logical backup docker image (zalando#1295)

Author: sagor999

charts/postgres-operator/values.yaml

@@ -239,7 +239,7 @@ configAwsOrGcp:
 # configure K8s cron job managed by the operator
 configLogicalBackup:
   # image for pods of the logical backup job (example runs pg_dumpall)
-  logical_backup_docker_image: "registry.opensource.zalan.do/acid/logical-backup:v.1.6.0"
+  logical_backup_docker_image: "registry.opensource.zalan.do/acid/logical-backup:v1.6.0"
   # path of google cloud service account json file
   # logical_backup_google_application_credentials: ""
   # prefix for the backup job name

manifests/postgresql-operator-default-configuration.yaml

@@ -115,7 +115,7 @@ configuration:
     # wal_gs_bucket: ""
     # wal_s3_bucket: ""
   logical_backup:
-    logical_backup_docker_image: "registry.opensource.zalan.do/acid/logical-backup:v.1.6.0"
+    logical_backup_docker_image: "registry.opensource.zalan.do/acid/logical-backup:v1.6.0"
     # logical_backup_google_application_credentials: ""
     logical_backup_job_prefix: "logical-backup-"
     logical_backup_provider: "s3"