cue/load: fix doc comment typo

The doc comment refers to `ImportPaths` but the actual method name is
`importPaths`.

Signed-off-by: Roger Peppe <rogpeppe@gmail.com>
Change-Id: I766b896b08d467d8c75c3f28ee69bfd50bac511e
Dispatch-Trailer: {"type":"trybot","CL":1185364,"patchset":2,"ref":"refs/changes/64/1185364/2","targetBranch":"master"}

cue/load/search.go

@@ -222,7 +222,7 @@ func (l *loader) importPaths(patterns []string) []*match {
 	return matches
 }
 
-// importPathsQuiet is like ImportPaths but does not warn about patterns with no matches.
+// importPathsQuiet is like importPaths but does not warn about patterns with no matches.
 func (l *loader) importPathsQuiet(patterns []string) []*match {
 	var out []*match
 	for _, a := range cleanPatterns(patterns) {