cmd/worker: use the most recent released version of gvisor

Change-Id: I10f54d914cccc23234ba54546e35bc729a3dc427
Reviewed-on: https://go-review.googlesource.com/c/pkgsite-metrics/+/479125
Run-TryBot: Zvonimir Pavlinovic <zpavlinovic@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
diff --git a/cmd/worker/Dockerfile b/cmd/worker/Dockerfile
index 1d68b9d..7a70bc1 100644
--- a/cmd/worker/Dockerfile
+++ b/cmd/worker/Dockerfile
@@ -42,7 +42,7 @@
 #### Sandbox setup
 
 # Install runsc.
-ADD https://storage.googleapis.com/gvisor/releases/release/20221107.0/x86_64/runsc /usr/local/bin/
+ADD https://storage.googleapis.com/gvisor/releases/release/20230320.0/x86_64/runsc /usr/local/bin/
 RUN chmod a+rx /usr/local/bin/runsc
 
 # Set up for runsc.