Update h5py requirement in /requirements/CI-tests-conda

Updates the requirements on [h5py](https://github.com/h5py/h5py) to permit the latest version.
- [Release notes](https://github.com/h5py/h5py/releases)
- [Changelog](https://github.com/h5py/h5py/blob/master/docs/release_guide.rst)
- [Commits](h5py/h5py@1.3.0...3.3.0)

---
updated-dependencies:
- dependency-name: h5py
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements/CI-tests-conda/requirements.txt

@@ -2,4 +2,4 @@ lmdb==0.9.24
 msprime==1.0.2
 python-lmdb==0.96
 zarr==2.10.1
-h5py<3.2
+h5py<3.4