Docs: Add BuildBuddy to commercial RBE offerings

https://docs.bazel.build/versions/3.4.0/remote-execution.html

Adding BuildBuddy RBE to the Commercial section of the remote-execution docs.

Closes #11814.

PiperOrigin-RevId: 324674662
diff --git a/site/docs/remote-execution.md b/site/docs/remote-execution.md
index a728dc7..8576a66 100644
--- a/site/docs/remote-execution.md
+++ b/site/docs/remote-execution.md
@@ -36,6 +36,8 @@
 *   Commercial
     *   [EngFlow Remote Execution](https://www.engflow.com) -- Remote execution
         and remote caching service. Can be self-hosted or hosted.
+    *   [BuildBuddy](https://www.buildbuddy.io) -- Remote build execution,
+        caching, and results UI.
 
 ## Requirements