bring back moto pin (still failing)

Author: martinfleis

ci/envs/311-latest.yaml

@@ -14,7 +14,7 @@ dependencies:
   - pytest-cov
   - hilbertcurve
   - s3fs
-  - moto
+  - moto<5  # <5 pin because of https://github.com/dask/dask/issues/10869
   - flask # needed for moto server
   # optional dependencies
   - pyarrow