add nltk back to workflows

.github/workflows/test.yml

@@ -39,6 +39,12 @@ jobs:
       - name: Install dependencies
         run: |
           poetry install --all-extras
+      - name: Install nltk
+        run: |
+          pip install nltk
+      - name: Download nltk data
+        run: |
+          python -m nltk.downloader punkt stopwords wordnet
       - name: Pytest
         run: |
           make test