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

Update the expected data to fix the longtest builder.

Updates #28856

Change-Id: I7fb6ee72e8469d974561b4b4057f40142f5b3654
Reviewed-on: https://go-review.googlesource.com/c/go/+/198557
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-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",
-		name:    "bb4e33bf68bf89cad44d386192cbed201f35b241",
-		short:   "bb4e33bf68bf",
-		time:    time.Date(2019, 9, 30, 19, 9, 21, 0, time.UTC),
+		version: "v2.2.5-0.20191002202810-970885f01c8b",
+		name:    "970885f01c8bc1fecb7ab1c8ce8e7609bda45530",
+		short:   "970885f01c8b",
+		time:    time.Date(2019, 10, 2, 20, 28, 10, 0, time.UTC),
 		gomod:   "module \"gopkg.in/yaml.v2\"\n\nrequire (\n\t\"gopkg.in/check.v1\" v0.0.0-20161208181325-20d25e280405\n)\n",
 	},
 	{