[Azure.Core.Experimental] Package Ref to Core (#18618)

The focus of these changes is to shift to a pacakge reference to Azure.Core,
allowing the dependency to bind to the latest GA release.

Author: jsquire

sdk/core/Azure.Core.Experimental/CHANGELOG.md

@@ -1,7 +1,9 @@
 # Release History
 
-## 0.1.0-preview.9 (Unreleased)
+## 0.1.0-preview.9 (2021-02-09)
 
+### Key Bug Fixes
+- Fixed a dependency issue with `Azure.Core`, rebinding the reference to the latest released package.
 
 ## 0.1.0-preview.8 (2021-02-09)
 

sdk/core/Azure.Core.Experimental/src/Azure.Core.Experimental.csproj

@@ -10,7 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <ProjectReference Include="../../Azure.Core/src/Azure.Core.csproj" />
+    <PackageReference Include="Azure.Core" />
   </ItemGroup>
 
   <ItemGroup>