…ation cp-7.81.0 (#31566)

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## **Description**

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Updates the World Cup homepage discovery overflow copy from “events in
total” to “markets in total”.
This matches the product language for the overflowing World Cup market
count while leaving the normal non-overflow event count unchanged.


## **Changelog**

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CHANGELOG entry: Updated World Cup discovery copy to say markets instead
of events for overflowing counts.

## **Related issues**

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Fixes:

## **Manual testing steps**

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```gherkin
Feature: World Cup discovery card copy
  Scenario: user sees overflowing World Cup market count
    Given the Predictions homepage discovery card has more World Cup items than the display limit
    When the user views the World Cup discovery row
    Then the overflow count says "{{count}}+ markets in total"
```

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<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Copy-only English localization and test assertion change with no logic
or data-handling impact.
> 
> **Overview**
> Updates World Cup homepage discovery **overflow** copy from “events”
to **markets** so overflowing counts match product terminology.
> 
> The English string
`predict.homepage_discovery.events_in_total_overflow` now renders
`{{count}}+ markets in total` instead of `{{count}}+ events in total`.
The non-overflow key `events_in_total` is unchanged. The
`PredictionsSection` test expectation for the discovery row was aligned
with the new copy.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
f19f028. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->