Fix ".Experimental" VSIX renaming (#1342)

* Fix ".Experimental" VSIX renaming

* Missed a case

(cherry picked from commit 38be6ea)

Author: DefaultRyan

dev/VSIX/Directory.Build.targets

@@ -77,7 +77,7 @@
                 <OriginalNugetRepositoryId>$(_tempVsTemplateNugetRepositoryId)</OriginalNugetRepositoryId>
                 <!-- 'ExperimentalNugetRepositoryId' needs to match the value set by the XmlPoke query for
                 "/ns:PackageManifest/ns:Metadata/ns:Identity/@Id" in Extension\WindowsAppSDK.Extension.csproj -->
-                <ExperimentalNugetRepositoryId>$(_tempVsTemplateNugetRepositoryId).Preview</ExperimentalNugetRepositoryId>
+                <ExperimentalNugetRepositoryId>$(_tempVsTemplateNugetRepositoryId).Experimental</ExperimentalNugetRepositoryId>
             </AllVSTemplates>
         </ItemGroup>
 

dev/VSIX/Extension/Directory.Build.targets

@@ -69,7 +69,7 @@
       Condition="'$(EnableExperimentalVSIXFeatures)'=='true'"
       XmlInputPath="$(VsixManifestSource)"
       Query="/ns:PackageManifest/ns:Metadata/ns:Identity/@Id"
-      Value="$(_OriginalVsixId).Preview"
+      Value="$(_OriginalVsixId).Experimental"
       Namespaces="<Namespace Prefix='ns' Uri='http://schemas.microsoft.com/developer/vsx-schema/2011' />" />
     <XmlPoke
       Condition="'$(EnableExperimentalVSIXFeatures)'=='true'"