Don't install zfpy in tests

Author: dstansby

.github/workflows/ci.yaml

@@ -59,7 +59,8 @@ jobs:
         run: |
           conda activate env
           export DISABLE_NUMCODECS_AVX2=""
-          python -m pip install -v -e .[test,test_extras,msgpack,zfpy,pcodec]
+          # TODO: put back zfpy import when it supports numpy 2.0
+          python -m pip install -v -e .[test,test_extras,msgpack,pcodec]
 
       - name: List installed packages
         shell: "bash -l {0}"