Update doc: there is no default value for --jobs.

PiperOrigin-RevId: 169710801
diff --git a/site/docs/user-manual.html b/site/docs/user-manual.html
index 2c797d8..abf6253 100644
--- a/site/docs/user-manual.html
+++ b/site/docs/user-manual.html
@@ -1838,7 +1838,7 @@
 <p>
   This option, which takes an integer argument, specifies a limit on
   the number of jobs that should be executed concurrently during the
-  execution phase of the build. The default is 200.
+  execution phase of the build.
 </p>
 <p>
   Note that the number of concurrent jobs that Bazel will run