cmd/go/internal/modfetch: update TestCodeRepo for gopkg.in/yaml.v2

The new yaml.v2 release broke the longtest builder. Update the expected
data.

Updates #28856

Change-Id: I98ec9e32e55bdb6b26b67e46dc16f34f77c2d40f
Reviewed-on: https://go-review.googlesource.com/c/go/+/198117Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>

src/cmd/go/internal/modfetch/coderepo_test.go

@@ -338,10 +338,10 @@ var codeRepoTests = []codeRepoTest{
 		vcs:     "git",
 		path:    "gopkg.in/yaml.v2",
 		rev:     "v2",
-		version: "v2.2.3-0.20190319135612-7b8349ac747c",
-		name:    "7b8349ac747c6a24702b762d2c4fd9266cf4f1d6",
-		short:   "7b8349ac747c",
-		time:    time.Date(2019, 03, 19, 13, 56, 12, 0, time.UTC),
+		version: "v2.2.3",
+		name:    "bb4e33bf68bf89cad44d386192cbed201f35b241",
+		short:   "bb4e33bf68bf",
+		time:    time.Date(2019, 9, 30, 19, 9, 21, 0, time.UTC),
 		gomod:   "module \"gopkg.in/yaml.v2\"\n\nrequire (\n\t\"gopkg.in/check.v1\" v0.0.0-20161208181325-20d25e280405\n)\n",
 	},
 	{