markdownlint: minor fixes

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I96bd138d6a3ead5a95763f7b98c085fd1adb09b4
diff --git a/README.md b/README.md
index 5385391..5bcd26f 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # The Mapper
 
 This repository contains the mapper, which assists in finding things on D-Bus.
-There is documentation about it [here][1].
+There is documentation about it in the [docs repository][architecture].
 
 ## Prerequisites
 
@@ -25,4 +25,5 @@
 
 `rm -rf build`
 
-[1]: https://github.com/openbmc/docs/blob/master/architecture/object-mapper.md
+[architecture]:
+  https://github.com/openbmc/docs/blob/master/architecture/object-mapper.md