Roll recipe dependencies (trivial).

This is an automated CL created by the recipe roller. This CL rolls
recipe changes from upstream projects (depot_tools) into this repository.

The build that created this CL was
https://ci.chromium.org/b/8773509020416497937

depot_tools:
https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/6d0c235dae4b7e664122eba4a02f97d4cf155241
  6d0c235 (brucedawson@chromium.org)
      Print reproxy start/stop times

Please check the following references for more information:
- autoroller, https://chromium.googlesource.com/infra/luci/recipes-py/+/main/doc/workflow.md#autoroller
- rollback, https://chromium.googlesource.com/infra/luci/recipes-py/+/main/doc/workflow.md#rollback
- cross-repo dependencies, https://chromium.googlesource.com/infra/luci/recipes-py/+/main/doc/cross_repo.md

Use https://goo.gl/noib3a to file a bug.

R=flutter-infra@grotations.appspotmail.com

Recipe-Tryjob-Bypass-Reason: Autoroller
Ignore-Freeze: Autoroller
Bugdroid-Send-Email: False
Change-Id: I3d2601b887022806c8a19ecd493668e2c5958e19
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/48680
Bot-Commit: flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com <flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com <flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com>
diff --git a/infra/config/recipes.cfg b/infra/config/recipes.cfg
index 66adb72..be66124 100644
--- a/infra/config/recipes.cfg
+++ b/infra/config/recipes.cfg
@@ -22,7 +22,7 @@
   "deps": {
     "depot_tools": {
       "branch": "refs/heads/main",
-      "revision": "138e18725c25c47d89b2f31fa3bb80b6ddb1bcdb",
+      "revision": "6d0c235dae4b7e664122eba4a02f97d4cf155241",
       "url": "https://chromium.googlesource.com/chromium/tools/depot_tools.git"
     },
     "fuchsia": {