Add authors in NuGet (#17)

Missing authors in NuGet

Author: pchalamet

src/FSharp.MongoDB.Bson/FSharp.MongoDB.Bson.fsproj

@@ -33,6 +33,7 @@
     <!-- https://docs.microsoft.com/en-us/nuget/reference/msbuild-targets#packing-using-a-nuspec -->
     <PackageId>FSharp.MongoDB</PackageId>
     <Title>FSharp.MongoDB</Title>
+    <Authors>Max Hirschhorn;Pierre Chalamet</Authors>
     <Description>Add F# support to MongoDB.Driver</Description>
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
     <PackageProjectUrl>https://github.com/pchalamet/FSharp.MongoDB</PackageProjectUrl>