FIX: Security scans versioning in validation-tests.yml

FIX: Security scans versioning in `validation-tests.yml`
Pinned down the version of pipenv being installed by `python3 -m pip`

Signed-off-by: Miłosz Linkiewicz <[email protected]>

Author: Mionsz

.github/workflows/validation-tests.yml

@@ -187,7 +187,7 @@ jobs:
         working-directory: tests/validation
         id: pipenv-install
         run: |
-          python3 -m pip install pipenv
+          python3 -m pip install pipenv~=2024.0.3
           python3 -m pipenv install -r requirements.txt
           echo "VIRTUAL_ENV=$(python3 -m pipenv --venv)/bin/activate" >> "$GITHUB_ENV"