update branch for tf-m-* repo

Updated branches for tf-m-tests and  tf-m-extras from master to main

Change-Id: I9ac9f4509fcb2eadd064a55fd3ed4f20526c5ef2
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/scripts/clone.sh b/scripts/clone.sh
index e8e5567..94c55e4 100755
--- a/scripts/clone.sh
+++ b/scripts/clone.sh
@@ -29,6 +29,7 @@
 
 # Global defaults
 REFSPEC_MASTER="refs/heads/master"
+REFSPEC_MAIN="refs/heads/main"
 GIT_REPO="https://git.trustedfirmware.org"
 GERRIT_HOST="https://review.trustedfirmware.org"
 GIT_CLONE_PARAMS=""
@@ -48,8 +49,8 @@
 TF_GERRIT_REFSPEC="${TF_GERRIT_REFSPEC:-${REFSPEC_MASTER}}"
 TFTF_GERRIT_REFSPEC="${TFTF_GERRIT_REFSPEC:-${REFSPEC_MASTER}}"
 SPM_REFSPEC="${SPM_REFSPEC:-${REFSPEC_MASTER}}"
-TF_M_TESTS_GERRIT_REFSPEC="${TF_M_TESTS_GERRIT_REFSPEC:-${REFSPEC_MASTER}}"
-TF_M_EXTRAS_GERRIT_REFSPEC="${TF_M_EXTRAS_GERRIT_REFSPEC:-${REFSPEC_MASTER}}"
+TF_M_TESTS_GERRIT_REFSPEC="${TF_M_TESTS_GERRIT_REFSPEC:-${REFSPEC_MAIN}}"
+TF_M_EXTRAS_GERRIT_REFSPEC="${TF_M_EXTRAS_GERRIT_REFSPEC:-${REFSPEC_MAIN}}"
 CI_REFSPEC="${CI_REFSPEC:-${REFSPEC_MASTER}}"
 JOBS_REFSPEC="${JOBS_REFSPEC:-${REFSPEC_MASTER}}"