typo fix in aptly mirror

Change-Id: I8da1106797d79421586fcafafbb5772f37503dfc
diff --git a/aptly/server/mirror/debian/aptly.yml b/aptly/server/mirror/debian/aptly.yml
index d4e4a61..ce05ee6 100644
--- a/aptly/server/mirror/debian/aptly.yml
+++ b/aptly/server/mirror/debian/aptly.yml
@@ -3,7 +3,7 @@
     mirror_aptly_source: http://repo.aptly.info/
     mirror_aptly_distribution: squeeze
     mirror_aptly_components: main
-    mirrot_aptly_gpgkeys:
+    mirror_aptly_gpgkeys:
       - 9C7DE460
   aptly:
     server: