setup poetry cache in actions

Author: zsimjee

.github/workflows/ci.yml

@@ -154,11 +154,16 @@ jobs:
         NLTK_DATA: /tmp/nltk_data
     steps:
         - name: Checkout repository
-          uses: actions/checkout@v2    
+          uses: actions/checkout@v2 
         - name: Set up Python
           uses: actions/setup-python@v4
           with: 
             python-version: 3.11.x
+        - name: Poetry cache
+          uses: actions/cache@v3
+          with:
+            path: ~/.cache/pypoetry
+            key: poetry-cache-${{ runner.os }}-${{ steps.setup_python.outputs.python-version }}-${{ env.POETRY_VERSION }}
         - name: Install Poetry
           uses: snok/install-poetry@v1
           with: