[roll] Roll fuchsia [sdk][python3] Port GN-SDK scripts to Python3.
Additionally, update the docs to direct integrators to use the
vendored Python in //prebuilt/third_party/python3.
Original-Bug: 60187
Test: prebuilt/third_party/python3/linux-x64/bin/python3.8 scripts/sdk/gn/test_generate.py
Test: fx test host_x64/obj/scripts/sdk/gn/bash_tests/gn_sdk_script_tests.sh
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/482473
Original-Revision: b2328d97cbc1d39e99161f140960a3de3832db61
GitOrigin-RevId: caeb5454a7a9b8b8d059b7c58e714ae50340bb82
Change-Id: Ia6913dad193e86874e481ea1840bb8c69dbb6b3a
diff --git a/stem b/stem
index 4aa7f3b..280a14d 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
githooks=""
remote="https://fuchsia.googlesource.com/fuchsia"
gerrithost="https://fuchsia-review.googlesource.com"
- revision="2b5c8c38c031f3ab9e62cc7e7d2cdfb4a4aa7298"/>
+ revision="b2328d97cbc1d39e99161f140960a3de3832db61"/>
</projects>
<hooks>
<hook name="install-environment"