Fixes CI

Author: sobolevn

.github/workflows/test.yml

@@ -18,12 +18,11 @@ jobs:
 
     - name: Install poetry
       run: |
-        pip install -U pip
-
         curl -sSL \
-          "https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py" | python -
+          "https://raw.githubusercontent.com/python-poetry/poetry/master/install-poetry.py" | python
 
-        echo "${HOME}/.poetry/bin" >> $GITHUB_PATH
+        # Adding `poetry` to `$PATH`:
+        echo "$HOME/.poetry/bin" >> $GITHUB_PATH
 
     - name: Install dependencies
       run: |