roll: gn

From: git_revision:7b0690e9ce87bae8c2447ca4a3b5788b3597e8f4
To: git_revision:b6203d186bff6b39ac25af6c1e80e1d3f96c949a

CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ib5b0f4d2e371e4537fc2f0eb765e3e44c5dfdd9e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/13304
Reviewed-by: Pigweed Roller <pigweed-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json b/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json
index a98ab96..c62fa5f 100644
--- a/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json
+++ b/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json
@@ -2,7 +2,7 @@
   {
     "path": "gn/gn/${os}-${arch=amd64}",
     "tags": [
-      "git_revision:7b0690e9ce87bae8c2447ca4a3b5788b3597e8f4"
+      "git_revision:b6203d186bff6b39ac25af6c1e80e1d3f96c949a"
     ]
   },
   {