Fixing the header for the IPs section.

Signed-off-by: Tim 'mithro' Ansell <tansell@google.com>

docs/IPs/ips.rst

diff --git a/docs/IPs/ips.rst b/docs/IPs/ips.rst
index a234a39..c1f72b3 100644
--- a/docs/IPs/ips.rst
+++ b/docs/IPs/ips.rst
@@ -1,9 +1,10 @@
 
-****
-I/Os
-****
+************
+IPs / Macros
+************
+
 .. toctree::
-    :maxdepth: 2
+    :maxdepth: 3
     :glob:
 
     IO/io