CI: fix running tests on nightly dependencies (#462)

Author: theroggy

ci/envs/nightly-deps.yml

@@ -7,7 +7,7 @@ dependencies:
   - geopandas-base
   - pip
   - pip:
-    - --pre --index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple --extra-index-url https://pypi.fury.io/arrow-nightlies/ --extra-index-url https://pypi.org/simple
+    - --pre --prefer-binary --index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple --extra-index-url https://pypi.fury.io/arrow-nightlies/ --extra-index-url https://pypi.org/simple
     - numpy>=2.0.0.dev
     - shapely
     - pandas