llvmbot monitor: Rename column to "Build" from "Build #"

I've not once cared what the actual number of the build was.
If you want to see where it sits relative to the others, click
the link instead.

Change-Id: I5196a9cee3e782cfe726bf8f5c2ed1c243d1687e
diff --git a/monitor/README.txt b/monitor/README.txt
index fa549ad..06f0cec 100644
--- a/monitor/README.txt
+++ b/monitor/README.txt
@@ -104,7 +104,7 @@
     that have gotten disconnected. If this time is greater than 24 hours, it will be shown
     in red.
   * "Duration": The length of the last build.
-  * "Build #": The build number of the last finished build, which itself will be a link
+  * "Build": The build number of the last finished build, which itself will be a link
     to the results page for that build.
   * "Failing steps": The failed build steps, if it was a failed build.
   * "Build In Progress": This will be "Yes" if there is a build currently running or "No"
diff --git a/monitor/bot-status.py b/monitor/bot-status.py
index 57b32b9..336f601 100755
--- a/monitor/bot-status.py
+++ b/monitor/bot-status.py
@@ -158,7 +158,7 @@
             "Status",
             "T Since",
             "Duration",
-            "Build #",
+            "Build",
             "Failing steps",
             "Build In Progress",
     ]