vars: s/lineageos_branch/os_branch/

Change-Id: Ib50ef80435e535c523935ffd177c339e615411a9
diff --git a/vars/common b/vars/common
index d328c63..4f8f0f6 100644
--- a/vars/common
+++ b/vars/common
@@ -1,6 +1,6 @@
 # Entire file updated manually
-readonly prev_lineageos_branch=lineage-19.0
-readonly lineageos_branch=lineage-19.1
+readonly prev_os_branch=lineage-19.0
+readonly os_branch=lineage-19.1
 
 readonly prev_common_aosp_tag=android-12.1.0_r7 # Jun 2022, Pixels 4 - 5, and 6 VZW
 readonly common_aosp_tag=android-12.1.0_r11 # Jul 2022, Pixels 4 - 5, and 6 VZW