Fix invalid JSON

[AlexErrant]

More or less a typo fix.

Also, what does "topo" mean? Searching the docs for "topo" yields nothing, and searching the repo yields

turborepo/turbo.json

Lines 215 to 219 in a8f38f1

	// This is a synthetic tasks that lets us pull in other workspaces as dependencies
	// So changes in internal workspaces that we depend on, will trigger this task.
	"topo": {
	"dependsOn": ["^topo"]
	}

Why should check-types depend on topo? The docs point me to "Transit Nodes", but I'm still confused. In particular,

Turborepo calls the ui package a Transit Node in this scenario, because it doesn't have its own build script.

So should we not have a topo script? If this is the case, why do other turbo.json files in this repo have a topo task (which does nothing; see below)?

Also, this repo's own check-types doesn't depend on topo. This is especially confusing when combined with this comment I found

turborepo/examples/turbo.json

Lines 3 to 6 in a8f38f1

	"tasks": {
	// This needs to exist because upstream packages depend on it and
	// it's not defined at the root level.
	"topo": {},

because uh... the root turbo.json does have a topo task (see above).

I'm a turborepo noob so perhaps I'm missing something obvious, but I'm filled with confusion while trying to setup Typescript right now 😢.

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[anthonyshew]

Thanks!

topo is explained here: https://turbo.build/repo/docs/crafting-your-repository/configuring-tasks#dependent-tasks-that-can-be-ran-in-parallel

We should add a backlink in a separate PR!