update description and generate docs (#267)

Author: GokceGK

docs/stackit_postgresflex_instance_clone.md

@@ -27,7 +27,7 @@ stackit postgresflex instance clone INSTANCE_ID [flags]
 
 ```
   -h, --help                        Help for "stackit postgresflex instance clone"
-      --recovery-timestamp string   Recovery timestamp for the instance, in a date-time with the RFC3339 layout format, e.g. 2024-01-01T00:00:00Z
+      --recovery-timestamp string   Recovery timestamp for the instance, in a date-time with the layout format YYYY-MM-DDTHH:mm:ss±HH:mm, e.g. 2006-01-02T15:04:05-07:00
       --storage-class string        Storage class. If not specified, storage class from the existing instance will be used.
       --storage-size int            Storage size (in GB). If not specified, storage size from the existing instance will be used.
 ```

internal/cmd/postgresflex/instance/clone/clone.go

@@ -115,7 +115,7 @@ func NewCmd(p *print.Printer) *cobra.Command {
 }
 
 func configureFlags(cmd *cobra.Command) {
-	cmd.Flags().String(recoveryTimestampFlag, "", "Recovery timestamp for the instance, in a date-time with the RFC3339 layout format, e.g. 2024-01-01T00:00:00Z")
+	cmd.Flags().String(recoveryTimestampFlag, "", "Recovery timestamp for the instance, in a date-time with the layout format YYYY-MM-DDTHH:mm:ss±HH:mm, e.g. 2006-01-02T15:04:05-07:00")
 	cmd.Flags().String(storageClassFlag, "", "Storage class. If not specified, storage class from the existing instance will be used.")
 	cmd.Flags().Int64(storageSizeFlag, 0, "Storage size (in GB). If not specified, storage size from the existing instance will be used.")