b/226391122 Change default branch name to main as per go/respectful-code
b/226391122 Change default branch name to main as per go/respectful-code

Change-Id: I51f37b1c696caee7353044899dd238defcc78097
Reviewed-on: https://edge-internal-review.git.corp.google.com/c/hybrid/apigee-hybrid-install/+/324282
Reviewed-by: Brijesh Panara <dcb3fa871a3493f3306abb2b5e6d1d781e758c6b@google.com>

apigee/apigee-hybrid-install