Fix transaction type text in TransactionDetailBox (uplift to 1.34.x)

[brave-builds]

Uplift of #11344
Resolves brave/brave-browser#19841

Pre-approval checklist:

• You have tested your change on Nightly.
• This contains text which needs to be translated.
  • There are more than 7 days before the release.
  • I've notified folks in #l10n on Slack that translations are needed.
• The PR milestones match the branch they are landing to.

Pre-merge checklist:

• You have checked CI and the builds, lint, and tests all pass or are not related to your PR.

Post-merge checklist:

• The associated issue milestone is set to the smallest version that the changes is landed on.

[kjozwiak]

macOS failed test-browser due to both RewardsContributionBrowserTest.SplitProcessOneTimeTip & RewardsContributionBrowserTest.SplitProcessorAutoContribution failing as per https://ci.brave.com/job/pr-brave-browser-pr11344_fix_func_type_UI_1.34.x-macos/1/testReport/. However, these are known intermittent issues as per brave/brave-browser#13883 & brave/brave-browser#13884 and don't block the above uplift as they're not related to this specific PR.

[kjozwiak]

Uplift into 1.34.x approved after deliberating with @brave/uplift-approvers. QA has verified the PR on Nightly as per #11344 (comment).