chore: point to the correct readme (aws#845)

Author: ajewellamz

DynamoDbEncryption/runtimes/net/DynamoDbEncryption.csproj

@@ -52,7 +52,7 @@
 
   <ItemGroup>
     <None Include="..\..\icon.png" Pack="true" PackagePath="" />
-    <None Include="..\README.md" Pack="true" PackagePath="" />
+    <None Include="README.md" Pack="true" PackagePath="" />
   </ItemGroup>
 
 </Project>