restore prerelease status to azure

*needs to be updated to latest package*

Author: John Campion

src/Senders/FluentEmail.Azure.Email/FluentEmail.Azure.Email.csproj

@@ -5,6 +5,7 @@
         <AssemblyTitle>Fluent Email - Azure Email</AssemblyTitle>
         <PackageTags>$(PackageTags);azureemail</PackageTags>
         <TargetFramework>net6.0</TargetFramework>
+        <Version>$(Version)-pre</Version>
         <PackageId>jcamp.$(AssemblyName)</PackageId>
         <Product>jcamp.$(AssemblyName)</Product>
     </PropertyGroup>