fix broken link (#33)

Author: devhawk

documentation/README.md

@@ -2,8 +2,8 @@
 
 The [Cadence](./cadence.md) of the DevOps Team (meetings, etc.)
 
-A [Directory](./dirctory.md) of teams (AWS, etc.)
+A [Directory](./directory.md) of teams (AWS, etc.)
 
 [Policies](./policies.md) for how the team is expected to operate
 
-Looking for [Engagement](./engagement.md) with the team, start here.
+Looking for [Engagement](./engagement.md) with the team, start here.