Fix localization issue for shortcut conflict window (#41378)

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## Summary of the Pull Request
Added localization for conflict message shown in shortcut conflict
window and shortcut dialog.

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## PR Checklist

- [x] Closes: #41373 
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [x] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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## Detailed Description of the Pull Request / Additional comments

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Signed-off-by: Shawn Yuan <shuaiyuan@microsoft.com>

src/settings-ui/Settings.UI/Strings/en-us/Resources.resw

@@ -2691,6 +2691,12 @@ Right-click to remove the key combination, thereby deactivating the shortcut.</v
     <value>Shortcuts with **Ctrl** and **Alt** may remove functionality from some international keyboards, because **Ctrl** + **Alt** = **Alt Gr** in those keyboards.</value>
     <comment>The ** sequences are used for text formatting of the key names. Don't remove them on translation.</comment>
   </data>
+  <data name="WarningShortcutConflict.Title" xml:space="preserve">
+    <value>Shortcut conflict</value>
+  </data>
+  <data name="WarningShortcutConflict.ToolTipService.ToolTip" xml:space="preserve">
+    <value>A conflict has been detected for this shortcut.</value>
+  </data>
   <data name="FancyZones_SpanZonesAcrossMonitors.Description" xml:space="preserve">
     <value>All monitors must have the same DPI scaling and will be treated as one large combined rectangle which contains all monitors</value>
   </data>