Use fixed poetry version 1.8.5 also for create PR

Signed-off-by: Alexander Dahmen <[email protected]>

Author: Fyusel

.github/workflows/sdk-pr.yaml

@@ -74,6 +74,6 @@ jobs:
           python -m venv .venv
           . .venv/bin/activate
           python -m pip install --upgrade pip
-          pip install poetry
+          pip install poetry==1.8.5
           poetry config virtualenvs.create false
           scripts/sdk-create-pr.sh "generator-bot-${{ github.run_id }}" "Generated from GitHub run [${{ github.run_id }}](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})" "[email protected]:stackitcloud/stackit-sdk-python.git" "python"