Update Blaze user manual to mention the new blaze run behavior.

RELNOTES: None.
PiperOrigin-RevId: 203723885
diff --git a/site/docs/user-manual.html b/site/docs/user-manual.html
index 84c963c..49370b0 100644
--- a/site/docs/user-manual.html
+++ b/site/docs/user-manual.html
@@ -3857,9 +3857,8 @@
 <b>For <code>bazel run</code>:</b>
 <ul>
   <li><code>1</code> - Build failed.</li>
-  <li><code>6</code> - Run command failure. The executed subprocess returned a
-                       non-zero exit code. The actual subprocess exit code is
-                       given in stderr.</li>
+  <li>If the build succeeds but the executed subprocess returns a non-zero exit code it will be the
+    exit code of the command as well.</li>
 </ul>