Update setup-env.sh

Author: bertiethorpe

dev/setup-env.sh

@@ -3,7 +3,7 @@
 set -euo pipefail
 
 if [[ ! -d "venv" ]]; then
-    /usr/bin/python3 -m venv venv # use `sudo yum install python38` on Rocky Linux 8 to install this
+    /usr/bin/python3.8 -m venv venv # use `sudo yum install python38` on Rocky Linux 8 to install this
 fi
 . venv/bin/activate
 pip install -U pip