Remove unused ```

![image](https://github.com/bazelbuild/bazel/assets/46747123/849934e1-0a16-4119-8799-4cb4088e40a7)

Closes #21447.

PiperOrigin-RevId: 609044286
Change-Id: Ic6866d06ee566db60cc0f365865f30968587ad83
diff --git a/site/en/docs/sandboxing.md b/site/en/docs/sandboxing.md
index 691067d..6562986 100644
--- a/site/en/docs/sandboxing.md
+++ b/site/en/docs/sandboxing.md
@@ -116,7 +116,6 @@
 -   [Multiplex workers](/remote/multiplex) require explicit worker support
     to be sandboxed. Workers that do not support multiplex sandboxing run as
     singleplex workers under dynamic execution, which can cost extra memory.
-    ```
 
 ## Debugging {:#debugging}