Rename poetry job; cache poetry dependencies

.github/workflows/poetry-install-deps.yml

@@ -3,7 +3,7 @@ name: Testing GH Actions
 on: 
   - push
 jobs:
-  pip-deps:
+  poetry-deps:
 
     strategy:
       matrix:
@@ -19,7 +19,7 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
-#          cache: 'pip'
+          cache: 'poetry'
 
       - name: Install dependencies
         run: |