Initial manifest for Android 11

Change-Id: Icd6eeac35c2272947cbdff60c3ae7d76e4422b39
diff --git a/README.mkdn b/README.mkdn
index 32b095d..a0e49ca 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-17.1
+repo init -u git://github.com/LineageOS/android.git -b lineage-18.0
 ```
 Then to sync up:
 ```