Editorial: fix assert in ResolveExport (#3717)

Author: bakkot

spec.html

@@ -28461,7 +28461,7 @@ <h1>
                   1. If _starResolution_ is *null*, then
                     1. Set _starResolution_ to _resolution_.
                   1. Else,
-                    1. Assert: There is more than one `*` import that includes the requested name.
+                    1. Assert: There is more than one `*` export that includes the requested name.
                     1. If _resolution_.[[Module]] and _starResolution_.[[Module]] are not the same Module Record, return ~ambiguous~.
                     1. If _resolution_.[[BindingName]] is not _starResolution_.[[BindingName]], return ~ambiguous~.
               1. Return _starResolution_.