Manually bump chromiumos/config dependency pin

There's likely a bug in the autoroller that doesn't allow
the chromiumos/config pin in this repo to be updated.

Ease the pressure by doing a manual pin bump.

BUG=chromium:1063407
TEST=./recipes/recipes.py fetch

Change-Id: I7d68a9fdf99e01be54bb860184c246851512eca4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2112686
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
Auto-Submit: Prathmesh Prabhu <pprabhu@chromium.org>
Reviewed-by: Andrew Lamb <andrewlamb@chromium.org>
Commit-Queue: Andrew Lamb <andrewlamb@chromium.org>
1 file changed