Fix a bug when forking a repository in an organization (#36950)

`CanCreateOrgRepo` should be checked before forking a repository into this organization.

---------

Signed-off-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

tests/integration/integration_test.go

@@ -415,7 +415,7 @@ func DecodeJSON[T any](t testing.TB, resp *httptest.ResponseRecorder, v T) (ret
 
 	// FIXME: JSON-KEY-CASE: for testing purpose only, because many structs don't provide `json` tags, they just use capitalized field names
 	decoder := json.NewDecoderCaseInsensitive(resp.Body)
-	require.NoError(t, decoder.Decode(v))
+	require.NoError(t, decoder.Decode(&v))
 	return v
 }