Camera: Metadata: Fix markdown error in Readme.md

Protect filename that contains syntax-parsed "_" character.

Change-Id: I7688ba2e2fbf3172be46e7652fc1d228a5f474b4
diff --git a/camera/docs/README.md b/camera/docs/README.md
index 3cdae4d..cf7902b 100644
--- a/camera/docs/README.md
+++ b/camera/docs/README.md
@@ -8,7 +8,7 @@
 
 ## Dependencies
 * Python 2.7.x+
-* Beautiful Soup 4+ - HTML/XML parser, used to parse metadata_properties.xml
+* Beautiful Soup 4+ - HTML/XML parser, used to parse `metadata_properties.xml`
 * Mako 0.7+         - Template engine, needed to do file generation
 * Tidy              - Cleans up the XML/HTML files.
 * XML Lint          - Validates XML against XSD schema