Update prerun_utils.R

[seankgibson]

Pull request overview

Two corrections to daily totals

Pull request checklist

Please check if your PR fulfils the following:

• [ x] Tests for the changes have been added (for bug fixes / features)
• [ x] Docs have been reviewed and added / updated if needed (for bug fixes / features)
• [ x] Tests have been run locally and are passing (run_tests_locally())
• [ x] Code is styled according to tidyverse styling (checked locally with tidy_code())

What is the current behaviour?

Generation of NA values in dashboard output.

• Week commencing not included in group by and therefore empty on bind.
• Total not added to school type and therefore empty on bind

What is the new behaviour?

NA values no longer created

Anything else

Add any notes for people reviewing and testing your code that are appropriate. Tag a @person to review if someone in particular needs to see this.