translate: fix broken integration test

"Hello" was previously being translated to "Bonjour", but has recently
started instead being translated to "Salut" due to some changes in the
model/service.

So, this CL changes the test to assert on a less ambiguous word:
"Thanks" == "Merci".

Change-Id: I56120c8b984ad720bb9a0272e7cb2d82c83dbfb1
Reviewed-on: https://code-review.googlesource.com/c/gocloud/+/45530
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>

translate/translate_test.go

@@ -216,15 +216,15 @@ func TestTranslateModel(t *testing.T) {
 	c := initTest(ctx, t)
 	defer c.Close()
 
-	trs, err := c.Translate(ctx, []string{"Hello"}, language.French, &Options{Model: "nmt"})
+	trs, err := c.Translate(ctx, []string{"Thanks"}, language.French, &Options{Model: "nmt"})
 	if err != nil {
 		t.Fatal(err)
 	}
 	if len(trs) != 1 {
 		t.Fatalf("wanted one Translation, got %d", len(trs))
 	}
 	tr := trs[0]
-	if got, want := tr.Text, "Bonjour"; got != want {
+	if got, want := tr.Text, "Merci"; got != want {
 		t.Errorf("text: got %q, want %q", got, want)
 	}
 	if got, want := tr.Model, "nmt"; got != want {