Changes for new 6.18.z branch

Author: actions-user

.github/dependabot.yml

@@ -10,6 +10,7 @@ updates:
     schedule:
       interval: "daily"
     labels:
+      - '6.18.z'
       - '6.17.z'
       - '6.16.z'
       - "CherryPick"
@@ -22,6 +23,7 @@ updates:
     schedule:
       interval: "daily"
     labels:
+      - '6.18.z'
       - '6.17.z'
       - '6.16.z'
       - "CherryPick"