fix: change python version

build.sh

@@ -1,11 +1,11 @@
 #!/bin/bash
 
 echo "Installing all requirements"
-python3.11 -m pip install -r requirements.txt
+python3.9 -m pip install -r requirements.txt
 
 echo "Migrating"
-python3.11 manage.py makemigrations --noinput
-python3.11 manage.py migrate --noinput
+python3.9 manage.py makemigrations --noinput
+python3.9 manage.py migrate --noinput
 
 echo "Collect Static"
-python3.11 manage.py collectstatic --noinput --clear
+python3.9 manage.py collectstatic --noinput --clear