Tweak the README wording.

This is basically a whitespace change to ensure that the CQ
and waterfall is working properly again.

TBR=mark@chromium.org
BUG=748681

Change-Id: I87a368e3261f8fa0eddd1c302522140694524b92
Reviewed-on: https://chromium-review.googlesource.com/592536
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Dirk Pranke <dpranke@chromium.org>

README.md

@@ -36,7 +36,7 @@ https://chromium.googlesource.com/crashpad/crashpad.
 
  * Bugs can be reported at the [Crashpad issue
    tracker](https://crashpad.chromium.org/bug/).
- * The [Crashpad Buildbot](https://build.chromium.org/p/client.crashpad)
-   performs automated builds and tests.
+ * The [Crashpad Buildbots](https://build.chromium.org/p/client.crashpad)
+   perform automated builds and tests.
  * [crashpad-dev](https://groups.google.com/a/chromium.org/group/crashpad-dev)
    is the Crashpad developers’ mailing list.