Update Microsoft.AspNetCore.Components.WebView.csproj (#52973)

Backport of #52638 to release/6.0

/cc @MackinnonBuck

# Fix `Microsoft.AspNetCore.Components.WebView.props` not getting packed correctly

Fixes an issue where `Microsoft.AspNetCore.Components.WebView.props` was not getting packed correctly. This was causing build failures for any project referencing `Microsoft.AspNetCore.Components.WebView`.

## Description

Fixes #52637

## Customer Impact

If customers were to reference a new version of this package without this fix, their app would fail to build. Our temporary workaround is to avoid shipping new versions of `Microsoft.AspNetCore.Components.WebView` until this issue gets fixed.

## Regression?

- [X] Yes
- [ ] No

Regressed from package version 6.0.25.

## Risk

- [ ] High
- [ ] Medium
- [X] Low

The fix is straightforward, and we've verified that the packages produced in CI contain the correct assets. A [MAUI dependency update](dotnet/maui#19236) was failing due to this bug, and the fix has shown to address it.

## Verification

- [X] Manual (required)
- [ ] Automated

## Packaging changes reviewed?

- [ ] Yes
- [ ] No
- [X] N/A


Co-authored-by: Mackinnon Buck <mackinnon.buck@gmail.com>

src/Components/WebView/WebView/src/Microsoft.AspNetCore.Components.WebView.csproj

@@ -34,6 +34,8 @@
 
   <ItemGroup>
     <None Include="buildTransitive\Microsoft.AspNetCore.Components.WebView.props" Pack="true" PackagePath="%(Identity)" />
+    <None Include="buildMultiTargeting\Microsoft.AspNetCore.Components.WebView.props" Pack="true" PackagePath="%(Identity)" />
+    <None Include="build\Microsoft.AspNetCore.Components.WebView.props" Pack="true" PackagePath="%(Identity)" />
   </ItemGroup>
 
   <ItemGroup>