[roll pigweed] targets: Use GN var for packages in docs

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/106150

https://pigweed.googlesource.com/pigweed/pigweed
pigweed Rolled-Commits: 98352cf70f9b2bb..675cc2e415b3084
Roller-URL: https://ci.chromium.org/b/8806082103353926961
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I49fef80be26ecb0d4ce90de5345c4a6e04cff015
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/zephyr-integration/+/106038
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/pigweed b/pigweed
index 98352cf..675cc2e 160000
--- a/pigweed
+++ b/pigweed
@@ -1 +1 @@
-Subproject commit 98352cf70f9b2bbfba1bbd2a108b5def41d2b6c7
+Subproject commit 675cc2e415b30843ee700f3cc45d57bc4b22997b