qa/crontab: Run Crimson main branch twice a week.

Crimson's suite is reletavly limited and currently is run for
main only (not for prior releases).
Changes to Crimson are more delicate and having more main runs
to compare to might help with (git-)bisecting issues

Signed-off-by: Matan Breizman <[email protected]>

Author: Matan-B

qa/crontab/teuthology-cronjobs

@@ -70,7 +70,7 @@ TEUTHOLOGY_SUITE_ARGS="--non-interactive --newest=100 --ceph-repo=https://git.ce
 32 20 * * 4        $CW $SS      4 --ceph main --suite powercycle -p 950
 40 20 * * 5        $CW $SS      1 --ceph main --suite        rgw -p 950
 48 20 * * 6        $CW $SS      4 --ceph main --suite       krbd -p 950 --kernel testing
-56 20 * * 6        $CW $SS      1 --ceph main --suite crimson-rados -p 101 --force-priority --flavor crimson
+56 20 * * 2,6      $CW $SS      1 --ceph main --suite crimson-rados -p 101 --force-priority --flavor crimson
 
 
 ## squid branch runs - weekly