Sign for the new managedCsWin32 dll (#40150)

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fix/what does it change/how was it tested (even manually, if necessary)?
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## Summary of the Pull Request
We need to sign for all dll in our pipeline. But I forgot to do it in
the last PR.

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## PR Checklist

- [ ] **Closes:** #xxx
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **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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Co-authored-by: Yu Leng <[email protected]>

Author: moooyo

.pipelines/ESRPSigning_core.json

@@ -22,6 +22,7 @@
             "CalculatorEngineCommon.dll",
             "PowerToys.ManagedTelemetry.dll",
             "PowerToys.ManagedCommon.dll",
+            "PowerToys.ManagedCsWin32.dll",
             "PowerToys.Common.UI.dll",
             "PowerToys.Settings.UI.Lib.dll",
             "PowerToys.GPOWrapper.dll",