Roll shaders-base from 50fae2cd87dc to 99b73d05cdae

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/shaders-base-skia
Please CC ashwinpv@google.com,skiabot@google.com on the revert to ensure that a human
is aware of the problem.

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To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Tbr: ashwinpv@google.com
Change-Id: I7c307d4c971893690d2d696c3d758bd94869169c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/907403
Bot-Commit: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/WORKSPACE.bazel b/WORKSPACE.bazel
index 7fd3ed6..7e5e735 100644
--- a/WORKSPACE.bazel
+++ b/WORKSPACE.bazel
@@ -669,7 +669,7 @@
 # Pulls the gcr.io/skia-public/shaders-base container.
 container_pull(
     name = "shaders-base",
-    digest = "sha256:50fae2cd87dc88400a366d293ffdea9b43e302d461ff966cdba03e3ac1ed25ca",
+    digest = "sha256:99b73d05cdae7c1c0e5eee3ec34f13b1438ffd3bd58d08e9937db98797cde30c",
     registry = "gcr.io",
     repository = "skia-public/shaders-base",
 )