chore: pin poetry to 2.1.3 in CI

Author: stephen-kintsugi

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Install Poetry
         uses: snok/install-poetry@76e04a911780d5b312d89783f7b1cd627778900a # v1.4.1
         with:
-          version: latest
+          version: "2.1.3"
           virtualenvs-create: true
           virtualenvs-in-project: true