Load cached poetry

.github/workflows/pypi-publish.yml

@@ -14,14 +14,21 @@ jobs:
       url: https://pypi.org/p/pyfracgen
     permissions:
       id-token: write
-    if: ${{ github.event.workflow_run.conclusion == 'success' }} && startsWith(github.ref, "refs/tags/")
+    if: ${{ github.event.workflow_run.conclusion == 'success' }} && startsWith(github.ref, 'refs/tags/')
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python
       uses: actions/setup-python@v4
       with:
         python-version: "3.x"
+    - name: Load cached poetry install
+        id: cached-poetry
+        uses: actions/cache@v3
+        with:
+          path: ~/.local
+          key: poetry-0
     - name: Install Poetry
+      if: steps.cached-poetry.outputs.cache-hit != 'true'
       uses: snok/install-poetry@v1
     - name: Check pyproject.toml
       run: poetry check --no-interaction