manifest: Move from android-10.0.0_r11 to android-10.0.0_r18

Change-Id: I285f58201a2973024eb5fb89a77f1a93402f3c2f
diff --git a/README.mkdn b/README.mkdn
index d3504c1..32b095d 100644
--- a/README.mkdn
+++ b/README.mkdn
@@ -9,7 +9,7 @@
 
 To initialize your local repository using the LineageOS trees, use a command like this:
 ```
-repo init -u git://github.com/LineageOS/android.git -b lineage-17.0
+repo init -u git://github.com/LineageOS/android.git -b lineage-17.1
 ```
 Then to sync up:
 ```