build: Use latest Poetry

1.5.0 has fixed <python-poetry/poetry#7589>.

.github/workflows/test.yml

@@ -147,25 +147,12 @@ jobs:
           python-version: ${{ matrix.python }}
 
       - name: Install Conda environment packages
-        run: conda install --channel=conda-forge --quiet --yes gdal=${{
-          env.GDAL_VERSION }} poetry=1.3.2 # Workaround for https://github.com/python-poetry/poetry/issues/7589
+        run:
+          conda install --channel=conda-forge --quiet --yes gdal=${{
+          env.GDAL_VERSION }} poetry
 
-      - name: Install Python packages on non-Windows runner
+      - name: Install Python packages
         run: poetry install --only=main --no-root
-        if: ${{ !startsWith(runner.os, 'Windows') }}
-
-      - name:
-          Install Python packages on Windows runner (Workaround for
-          https://github.com/python-poetry/poetry/issues/1031)
-        uses: nick-fields/retry@v2.8.3
-        with:
-          timeout_minutes: 9999 # Workaround for https://github.com/nick-fields/retry/issues/107
-          max_attempts: 6
-          command: bash --login -o errexit -c 'cd flooding/sentinel${{
-            matrix.sentinel }}_water_extraction && poetry install --only=main
-            --no-root' # Workaround for https://github.com/python-poetry/poetry/issues/7363 / https://github.com/nick-fields/retry/issues/89
-          shell: bash
-        if: ${{ startsWith(runner.os, 'Windows') }}
 
       - name: Run test
         run: