[Build System]: Frequent DocFx timeouts

[Aaronontheweb]

Version Information
Version of Akka.NET? latest dev branch

Describe the bug

Our DocFx build stage repeatedly times out and has frequently done so over the past several months:

[23-04-24 06:24:39.234]Warning:[MetadataCommand.ExtractMetadata]Timeout (1000ms) exceeded. Killing process git.
	1 Warning(s)
	0 Error(s)

It's this stage of our build pipeline:

akka.net/build.fsx

Lines 477 to 506 in fd4860b

	Target "DocFx" (fun _ ->
	// build the projects with samples
	let docsTestsProject = "./src/core/Akka.Docs.Tests/Akka.Docs.Tests.csproj"
	DotNetCli.Restore (fun p -> { p with Project = docsTestsProject })
	DotNetCli.Build (fun p -> { p with Project = docsTestsProject; Configuration = configuration })
	let docsTutorialsProject = "./src/core/Akka.Docs.Tutorials/Akka.Docs.Tutorials.csproj"
	DotNetCli.Restore (fun p -> { p with Project = docsTutorialsProject })
	DotNetCli.Build (fun p -> { p with Project = docsTutorialsProject; Configuration = configuration })
	// install MSDN references
	NugetInstall (fun p ->
	{ p with
	ExcludeVersion = true
	Version = "0.1.0-alpha-1611021200"
	OutputDirectory = currentDirectory @@ "tools" }) "msdn.4.5.2"
	let docsPath = FullName "./docs"
	let docFxPath = FullName(findToolInSubPath "docfx.exe" "tools/docfx.console/tools")
	let args = StringBuilder()
	|> append (docsPath @@ "docfx.json" )
	|> append ("--warningsAsErrors")
	|> toText
	let result = ExecProcess(fun info ->
	info.FileName <- docFxPath
	info.WorkingDirectory <- (Path.GetDirectoryName (FullName docFxPath))
	info.Arguments <- args) (System.TimeSpan.FromMinutes 45.0) (* Reasonably long-running task. *)
	if result <> 0 then failwithf "DocFX failed. %s %s" docFxPath args
	)

The treatWarningsAsErrors flag is what causes this to fail the build pipeline - we rely on that flag in order to make sure breakage doesn't happen inside the documentation website itself (i.e. broken links.)

Expected behavior

Unless there's a markdown / linking / code reference error, the website build successfully each and every time.

Actual behavior

Frequent, but inconsistent git timeouts during the DocFx build stage.

Additional context

This could be a function of how big the repository has become and we just need to expand the DocFx timeout for this stage - to something higher than 1s.