Update table docs

docs/source/api/apollo-server.mdx

@@ -41,20 +41,16 @@ const server = new ApolloServer({
 **Schema options**
 </td>
 </tr>
-<tr class="required">
+<tr class="optional">
 <td>
 
-##### `typeDefs`
+##### `httpFetch`
 
-`DocumentNode` or `Array<DocumentNode>`
+`fetch` implementation
 </td>
 <td>
-
-Document or documents that represent your server's GraphQL schema, generated by applying the `gql` tag to valid Schema Definition Language (SDL) strings.
-
-**Required** unless you provide [`schema`](#schema).
-
-For an example, see [Define your GraphQL schema](../getting-started/#step-3-define-your-graphql-schema).
+**Optional**
+Provide a custom `fetch` implementation to be used when making REST calls.
 </td>
 </tr>