Update translations: default (#12424)

This PR modifies translations in the project. It will append multiple
commits and may add, modify, or delete translations. Feel free to merge
any time.

## Before you deploy
- Check translations for malicious HTML.

## Merge conflicts?
<details>

If this PR has been open long enough that it has drifted out of sync
from the base branch and it has developed merge conflicts as a result,
follow these steps, in order:

1. Close this PR.
2. Run the following Spy command in Slack, inserting the PR number in
the second argument:

> `@spy translation-platform force-pull Shopify/polaris
pull_request_number=<this PR>`.

Translation Platform will recreate the translation commits based on the
latest commit on the base branch and open a new PR.

</details>

## Questions?
Visit [#help-localization](https://shopify.slack.com/messages/C7TJQLVC7)
for questions about this pull request.

Translation component owners: @Shopify/polaris-eng

Co-authored-by: translation-platform[bot] <34770790+translation-platform[bot]@users.noreply.github.com>

polaris-react/locales/nl.json

@@ -43,7 +43,7 @@
     },
     "ContextualSaveBar": {
       "save": "Opslaan",
-      "discard": "Verwijderen"
+      "discard": "Verwerpen"
     },
     "DataTable": {
       "sortAccessibilityLabel": "sorteer {direction} op",
@@ -91,9 +91,9 @@
       "end": "Einde van reeks"
     },
     "DiscardConfirmationModal": {
-      "title": "Alle niet-opgeslagen wijzigingen verwijderen",
-      "message": "Als je alle niet-opgeslagen wijzigingen verwijdert, wis je alle bewerkingen die je aanbracht sinds je voor het laatst opsloeg.",
-      "primaryAction": "Wijzigingen verwijderen",
+      "title": "Alle niet-opgeslagen wijzigingen verwerpen",
+      "message": "Als je wijzigingen verwerpt, worden alle wijzigingen sinds de laatste keer opslaan verwijderd.",
+      "primaryAction": "Wijzigingen verwerpen",
       "secondaryAction": "Doorgaan met bewerken"
     },
     "DropZone": {