Fix velox circle ci issue caused by moving master to main branch (#1)

Summary: Pull Request resolved: #1

Reviewed By: amitkdutta

Differential Revision: D30185670

fbshipit-source-id: dc6aa14370beb343d9840debcfccc945a7ff0cb8

.circleci/config.yml

@@ -57,7 +57,7 @@ jobs:
             - ~/deps
       - run:
           name: "Calculate merge-base for CCache"
-          command: git merge-base origin/master HEAD > merge-base
+          command: git merge-base origin/main HEAD > merge-base
       - restore_cache:
           name: "Restore CCache cache"
           keys:
@@ -85,7 +85,7 @@ jobs:
       - checkout
       - run:
           name: "Calculate merge-base for CCache"
-          command: git merge-base origin/master HEAD > merge-base
+          command: git merge-base origin/main HEAD > merge-base
       - restore_cache:
           name: "Restore CCache cache"
           keys: