Missing Nullable="false" if navigation property

Assemblies affected
ASP.NET Core OData 8.x

Describe the bug
Nullable="false" is missing on the property if a navigation property is present.

Reproduce steps
2 simples class, generating project, see $metadata

Data Model

public class Author
{
    public int AuthorId { get; set; }
    public string AuthorName { get; set; }
}

public class Book
{
    public int BookId { get; set; }
    public string BookTitle { get; set; }
    public int AuthorId { get; set; }

    public virtual Author Author { get; set; }
}

EDM Builder

var edmBuilder = new ODataConventionModelBuilder();
edmBuilder.EntitySet<Author>("Author");
edmBuilder.EntitySet<Book>("Book");

EDM (CSDL) Model

<edmx:Edmx xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx" Version="4.0">
  <edmx:DataServices>
    <Schema xmlns="http://docs.oasis-open.org/odata/ns/edm">
      <EntityType Name="Author">
        <Key>
          <PropertyRef Name="AuthorId"/>
        </Key>
        <Property Name="AuthorId" Type="Edm.Int32" Nullable="false"/>
        <Property Name="AuthorName" Type="Edm.String"/>
      </EntityType>
      <EntityType Name="Book">
        <Key>
          <PropertyRef Name="BookId"/>
        </Key>
        <Property Name="BookId" Type="Edm.Int32" Nullable="false"/>
        <Property Name="BookTitle" Type="Edm.String"/>
        <Property Name="AuthorId" Type="Edm.Int32"/>
        <NavigationProperty Name="Author" Type="Author">
          <ReferentialConstraint Property="AuthorId" ReferencedProperty="AuthorId"/>
        </NavigationProperty>
      </EntityType>
    </Schema>
    <Schema xmlns="http://docs.oasis-open.org/odata/ns/edm" Namespace="Default">
      <EntityContainer Name="Container">
        <EntitySet Name="Author" EntityType="Author"/>
        <EntitySet Name="Book" EntityType="Book">
          <NavigationPropertyBinding Path="Author" Target="Author"/>
        </EntitySet>
      </EntityContainer>
    </Schema>
  </edmx:DataServices>
</edmx:Edmx>

Expected behavior

<edmx:Edmx xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx" Version="4.0">
  <edmx:DataServices>
    <Schema xmlns="http://docs.oasis-open.org/odata/ns/edm">
      <EntityType Name="Author">
        <Key>
          <PropertyRef Name="AuthorId"/>
        </Key>
        <Property Name="AuthorId" Type="Edm.Int32" Nullable="false"/>
        <Property Name="AuthorName" Type="Edm.String"/>
      </EntityType>
      <EntityType Name="Book">
        <Key>
          <PropertyRef Name="BookId"/>
        </Key>
        <Property Name="BookId" Type="Edm.Int32" Nullable="false"/>
        <Property Name="BookTitle" Type="Edm.String"/>
        <Property Name="AuthorId" Type="Edm.Int32" Nullable="false"/>
        <NavigationProperty Name="Author" Type="Author" Nullable="false">
          <ReferentialConstraint Property="AuthorId" ReferencedProperty="AuthorId"/>
        </NavigationProperty>
      </EntityType>
    </Schema>
    <Schema xmlns="http://docs.oasis-open.org/odata/ns/edm" Namespace="Default">
      <EntityContainer Name="Container">
        <EntitySet Name="Author" EntityType="Author"/>
        <EntitySet Name="Book" EntityType="Book">
          <NavigationPropertyBinding Path="Author" Target="Author"/>
        </EntitySet>
      </EntityContainer>
    </Schema>
  </edmx:DataServices>
</edmx:Edmx>

<Property Name="AuthorId" Type="Edm.Int32" Nullable="false"/>
<NavigationProperty Name="Author" Type="Author" Nullable="false">

If I comment the navigation property, I get the good return :
<Property Name="AuthorId" Type="Edm.Int32" Nullable="false"/>