Addede example for add_endpoint_and_lookups_cmd

source/data-operations-manual.html.md.erb

@@ -53,7 +53,14 @@ to the collection. Make a note of the location. The following columns need to be
 If you haven't been given some of the above information then reach out to the data manager or tech lead for advice. You can use the below to get you started:
 
 ```text
-organisation, endpoint-url, documentation-url, start-date, pipelines, plugins
+organisation,endpoint-url,documentation-url,start-date,pipelines,plugin
+```
+
+For example 
+
+```text
+organisation,endpoint-url,documentation-url,start-date,pipelines,plugin
+local-authority-eng:GRT,https://www.guildford.gov.uk/media/35723/Guildford-Brownfield-Register-2023/CSV/guildford_brownfieldregister_2023_10_12_rev1.csv?m=638327116385130000,https://www.guildford.gov.uk/article/25473/What-is-the-register,2023-10-12,brownfield-land,
 ```
 
 #### 4. run `add_endpoint_and_lookups_cmd`