[Suggestion] Improve Algolia Indexing

[Ant-hem]

Hi there 👋

I am the maintainer of the Algolia Library and I noticed you are using it! That's awesome.
I was curious and I took a look at the code base and I found out this part we could improve.

discoverdotnet/src/DiscoverDotnet/Modules/UpdateSearchIndex.cs

Lines 51 to 66 in e5e6a21

	BrowseIndexResponse<JObject> results;
	int page = 0;
	do
	{
	RequestOptions options = new RequestOptions
	{
	QueryParameters = new Dictionary<string, string>
	{
	{ "page", page.ToString() }
	}
	};
	results = await index.BrowseFromAsync<JObject>(new BrowseIndexQuery(), options, context.CancellationToken);
	existing.AddRange(results.Hits);
	page++;
	}
	while (page < results.NbPages);

To get the entire index, one could simply do that:

var results = new List<JObject>();
foreach (var item in index.Browse<JObject>(new BrowseIndexQuery()))
{
     results.Add(item);
}

Browsing with the page parameter can lead to some issue. It's better to use the built-in Browse method.

Happy to PR this change if you would like!