Fix manifest and rename to "External Provider"

Change-Id: I563788d85761ded87fced9e27002354a456b9e65
diff --git a/service_test.go b/service_test.go
index 1a1d468..643ebe3 100644
--- a/service_test.go
+++ b/service_test.go
@@ -45,5 +45,5 @@
 
 	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Contains(t, w.Body.String(), "data-server=\"https://korap.ids-mannheim.de/\"")
-	assert.Contains(t, w.Body.String(), "<title>External Sale</title>")
+	assert.Contains(t, w.Body.String(), "<title>External Provider</title>")
 }