Fix staging cronjobs

cronjobs/cronjob_staging_daily.sh

@@ -3,6 +3,6 @@
 # Daily cronjobs for staging area
 
 cd /home/scipoststg/webapps/scipost/scipost_v1
-source venv/bin/activate
+source venv3.8/bin/activate
 
 python manage.py remind_fellows_to_submit_report

cronjobs/cronjob_staging_eachminute.sh

@@ -3,7 +3,7 @@
 # Per minute cronjobs for staging area
 
 cd /home/scipost/SciPost
-source venv/bin/activate
+source venv3.8/bin/activate
 
 # Mails waiting in the database
 #python manage.py send_mails

cronjobs/cronjob_staging_weekly.sh

@@ -3,6 +3,6 @@
 # Weekly cronjobs for staging area
 
 cd /home/scipoststg/webapps/scipost/scipost_v1
-source venv/bin/activate
+source venv3.8/bin/activate
 
 python manage.py email_fellows_tasklist