Add ees bulk upload guidance

[cjrace]

Overview of changes

Add new section on bulk uploads in EES

Why are these changes being made?

Recently released the new feature so wanted to add detailed instructions for it for users (and for our own future reference).

Detailed description of changes

New section under file uploads that explains the new bulk upload option

Updated all references to EES from "Explore Education Statistics" to "Explore education statistics" to match the service name.

Issue ticket number/s and link

No related issues.

Checklist before requesting a review

• I have checked the contributing guidelines
• I have checked for and linked any relevant issues that this may resolve
• I have checked that these changes build locally
• I understand that if merged into main, these changes will be publicly available

[jen-machin]

Happy with the explanation of the new process - would it help to also have a screenshot of an example of the dataset_names.csv file?

In terms of changing to "Explore education statistics" it's time for today's nitpicky comment! I'm sure you are thrilled. The style guide says that sentence case should be used for service names

I assume this means that anywhere that it occurs mid-sentence, it should be "explore education statistics"?

Happy to merge this as-is so you get it through for 1pm and then address these things separately if you wish.

[jen-machin]

Only one comment to address but nothing urgent that'd block the merge