Fix link in Task Graph doc. (vercel#8519)

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docs/repo-docs/core-concepts/package-and-task-graph.mdx

@@ -17,7 +17,7 @@ In `turbo.json`, you express how tasks relate to each other. You can think of th
 dependencies between tasks, but we have a more formal name for them: the Task
 Graph.
 
-Turborepo uses a data structure called a [directed acyclic graph (DAG)][1] to
+Turborepo uses a data structure called a [directed acyclic graph (DAG)](https://en.wikipedia.org/wiki/Directed_acyclic_graph) to
 understand your repository and its tasks. A graph is made up of "nodes" and
 "edges". In the Task Graph, the nodes are tasks and the edges are the
 dependencies between tasks. A _directed_ graph indicates that the edges