Fix reference to volatile-status.txt file name
Documentation for `workspace_status_command` erroneously referenced the `stable-status.txt` file twice instead of referencing both it and the `volatile-status.txt` file.
Closes
@@ -1462,7 +1462,7 @@ into binaries ("stamping")</h3>
<p>
"volatile" keys' values may change often. Bazel expects them to change all the time, like
timestamps do, and duly updates the
- <code>bazel-out/stable-status.txt</code>
+ <code>bazel-out/volatile-status.txt</code>
file. In order to avoid
rerunning stamped actions all the time though, <b>Bazel pretends that the volatile file never
changes</b>. In other words, if the volatile status file is the only file whose contents has
