fix(cli): Fix docker build to use poetry 1.8.5

Author: vvatelot

projects/ecoindex_cli/dockerfile

@@ -2,7 +2,7 @@ FROM python:3.12-slim AS requirements-stage
 
 WORKDIR /tmp
 
-RUN pip install poetry
+RUN pip install poetry poetry==1.8.5
 COPY pyproject.toml poetry.lock /tmp/
 RUN poetry export --output=requirements.txt --without-hashes