Smoke tests: update portal dependencies

Update portal dependencies when running smoke tests, in case new
dependencies have been added in a PR, or existing ones have been
modified.

.github/workflows/smoke-test.yml

@@ -85,6 +85,7 @@ jobs:
         docker exec portal.yoda sh -c 'set -x ; cd /var/www/yoda && git config remote.origin.fetch  "+refs/heads/*:refs/remotes/origin/*" && git pull'
         docker exec portal.yoda sh -c 'set -x ; cd /var/www/yoda && git checkout ${{ steps.extract_branch.outputs.branch }}'
         docker exec portal.yoda sh -c 'set -x ; cd /var/www/yoda && git status'
+        docker exec portal.yoda sh -c 'set -x ; cd /var/www/yoda && . venv/bin/activate && pip3 install -r requirements.txt'
         docker exec portal.yoda sh -c 'set -x ; touch /var/www/yoda/*.wsgi'
 
     - name: Check if portal is answering at all