Fix Starlark name typo in guide
Closes
@@ -43,7 +43,7 @@ filesystem or downloaded from the internet. Users can also write custom
This `WORKSPACE` file uses the same syntax as BUILD files, but allows a
different set of rules. The full list of built-in rules are in the Build
Encyclopedia's [Workspace Rules](be/workspace.html) and the documentation
-for [Embedded Starklark Repository Rules](repo/index.html).
+for [Embedded Starlark Repository Rules](repo/index.html).
<a name="types"></a>
## Supported types of external dependencies
