[Peek] Fix ShellPreviewHandler Previewer (#40111)

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## Summary of the Pull Request

CsWin32 0.3.183 broke preview through preview handlers in Peek.

`Error in UpdatePreviewAsync, falling back to default previewer: Unable
to cast COM object of type 'System.__ComObject' to class type
'System.IntPtr'. Instances of types that represent COM components cannot
be cast to types that do not represent COM components; however they can
be cast to interfaces as long as the underlying COM component supports
QueryInterface calls for the IID of the interface.`

Signature of `CoGetClassObject` changed for last argument from `void*`
to `object`.

Thanks @AArnott 🙂 

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## PR Checklist

- [ ] **Closes:** #xxx
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- [ ] **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
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for new binaries and localization folder
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pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
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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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## Validation Steps Performed

Tested Preview of Office files in Peek.

src/modules/peek/Peek.FilePreviewer/Previewers/ShellPreviewHandlerPreviewer/ShellPreviewHandlerPreviewer.cs

@@ -93,12 +93,12 @@ namespace Peek.FilePreviewer.Previewers
                             // TODO: Figure out how to get it to run in a low integrity level
                             if (!HandlerFactories.TryGetValue(clsid, out var factory))
                             {
-                                var hr = PInvoke_FilePreviewer.CoGetClassObject(clsid, CLSCTX.CLSCTX_LOCAL_SERVER, null, typeof(IClassFactory).GUID, out var pFactory);
+                                var hr = PInvoke_FilePreviewer.CoGetClassObject(clsid, CLSCTX.CLSCTX_LOCAL_SERVER, null, typeof(IClassFactory).GUID, out object pFactory);
                                 Marshal.ThrowExceptionForHR(hr);
 
                                 // Storing the factory in memory helps makes the handlers load faster
                                 // TODO: Maybe free them after some inactivity or when Peek quits?
-                                factory = (IClassFactory)Marshal.GetObjectForIUnknown((IntPtr)pFactory);
+                                factory = (IClassFactory)pFactory;
                                 factory.LockServer(true);
                                 HandlerFactories.AddOrUpdate(clsid, factory, (_, _) => factory);
                             }