Update README with new instructions

Also add missing copyrights blocks.

Bug: 139958135
Test: Manual
Change-Id: Ib1c88c6c4c1beb4c0556fc0560d83c77866c7c9f
diff --git a/car-chassis-lib/README.md b/car-chassis-lib/README.md
index b3e3c1c..3d1015a 100644
--- a/car-chassis-lib/README.md
+++ b/car-chassis-lib/README.md
@@ -19,10 +19,10 @@
 
 Here is the process for updating this library:
 
-1. Develop, test and create CL in Gerrit with the desired changes
-2. On Google3, run update.sh and test your changes
-3. Iterate until your changes look okay on both places.
-4. Back on Gerrit, submit your CL
-5. Back on Google3, run update.sh again and submit
+1. Develop, test and upload changes to Gerrit
+2. On Google3, run './update.sh review <cl>' (with <cl> being your Gerrit CL #) and test your changes
+3. Repeat #1 and #2 until your changes look okay on both places.
+4. Back on Gerrit, submit your CL.
+5. Back on Google3, run './update.sh manual' submit
 
 TODO: Automate this process using CaaS (in progress)