[Analytics Audit] OPML import finished property update

[danielebogo]

📘 Part of: #2628

Fixes #2677

Update the property for the opml_import_finished event.

To test

• Make sure to have the tracks log enabled
• Import an OPML file
• Confirm it tracks 🔵 Tracked: opml_import_finished ["number_parsed": YOUR_NUMBER]

Checklist

• I have considered if this change warrants user-facing release notes and have added them to CHANGELOG.md if necessary.
• I have considered adding unit tests for my changes.
• I have updated (or requested that someone edit) the spreadsheet to reflect any new or changed analytics.

[dangermattic]

	1 Warning
⚠️	This PR is assigned to the milestone 7.81 ❄️. The due date for this milestone has already passed. Please assign it to a milestone with a later deadline or check whether the release for this milestone has already been finished.

Generated by 🚫 Danger

[SergioEstevao]

Check my comment about the return being made on smaller OPML imports.

[SergioEstevao]

I think we need to remove this return or else if we are doing a smaller import the event bellow will not be tracked.

[danielebogo]

@SergioEstevao I removed the return also for the failure. Have look and test to confirm

[SergioEstevao]

thanks for the update!