Only fixed poetry on docs build job, not the test job

Author: davidorme

.github/workflows/ci.yml

@@ -38,7 +38,7 @@ jobs:
     - name: Install Poetry
       uses: abatilo/[email protected]
       with:
-        poetry-version: 1.5.1
+        poetry-version: "latest"
 
     - name: Install dependencies
       run: poetry install