[cipd.ensure][yapf] Roll yapf.

We are no longer using yapf for recipes, but might as well keep it in
sync with what is in the fuchsia/prebuilts.

Change-Id: Ib6eec184a8de7394a685e43e65ba8de334da52d1
Reviewed-on: https://fuchsia-review.googlesource.com/c/infra/prebuilt/+/401274
Reviewed-by: Gary Miguel <garymm@google.com>
Commit-Queue: Ina Huh <ihuh@google.com>
diff --git a/cipd.ensure b/cipd.ensure
index 0da1b0e..e23e85b 100644
--- a/cipd.ensure
+++ b/cipd.ensure
@@ -47,5 +47,5 @@
 infra/tools/preview_email/${platform} git_revision:8d8fc09592f1dbf99ceb32a637f395103101031e
 
 # YAPF
-# Keep in sync with tricium-recipes builder properties.
-infra/tools/yapf git_revision:2155d0d436bf346333810cc352791063e1dda952
+# Keep in sync with fuchsia/prebuilts.
+infra/tools/yapf git_revision:c3517c148417dc7c53141c4edda4a85765b04c62