Run "scripts/update-fuchsia-sdk.sh"

Roller-URL: https://ci.chromium.org/b/8826770716751643409
Cq-Cl-Tag: roller-builder:samples-sdk-updater
Cq-Cl-Tag: roller-bid:8826770716751643409
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Iec140e3d508d6d8a0bde6d085531f3ff23c04b04
Reviewed-on: https://fuchsia-review.googlesource.com/c/samples/+/624541
Commit-Queue: third_party Roller <third-party-roller@fuchsia-infra.iam.gserviceaccount.com>
diff --git a/sdk.version b/sdk.version
index 8cfee9e..892ba39 100644
--- a/sdk.version
+++ b/sdk.version
@@ -1 +1 @@
-7.20211225.3.1
+7.20211226.2.1