Replace PFX with more appropriate Contoso name (#219)

Author: oggy22

SampleApps/webview2_sample_uwp/WebView2_UWP_TemporaryKey.pfx

@@ -18,7 +18,7 @@
     <ProjectTypeGuids>{A5A43C5B-DE2A-4C0C-9213-0A381AF9435A};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
     <WindowsXamlEnableOverview>true</WindowsXamlEnableOverview>
     <AppxPackageSigningEnabled>True</AppxPackageSigningEnabled>
-    <PackageCertificateThumbprint>114a371f3b78be699bb00aab73dbe98b5ec0ecd4</PackageCertificateThumbprint>
+    <PackageCertificateThumbprint>883cdc84424381df3f1f10fd0bb8f7eeb00b042d</PackageCertificateThumbprint>
     <PackageCertificateKeyFile>WebView2_UWP_TemporaryKey.pfx</PackageCertificateKeyFile>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x86'">