Fix configuration header

This header did not format correctly due to the space.
https://github.com/openbmc/phosphor-host-ipmid/blob/master/docs/configuration.md

Tested: With https://jbt.github.io/markdown-editor/

Change-Id: Ief57b88b022844fd74740bb516b9d21f2590e7c3
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/docs/configuration.md b/docs/configuration.md
index 61caaf1..4e833d9 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -1,4 +1,4 @@
-#Device ID Configuration#
+# Device ID Configuration
 
 There is a default dev_id.json file provided by
 meta-phosphor/common/recipes-phosphor/ipmi/phosphor-ipmi-host.bb