Encoding comma as %2C

Problem/Motivation

The upload documentation (/admin/structure/webform/manage/{webformID}/results/upload) suggests encoding comma as %2E, but the URI encoding for comma is %2C. The code (webform/modules/webform_submission_export_import/src/WebformSubmissionExportImportImporter.php) properly parses %2C, but the notice on the page is wrong.

Proposed resolution

Change %2E to %2C on upload notes.