pin scipy with jax (#5730)

### Before submitting

Please complete the following checklist when submitting a PR:

- [ ] All new features must include a unit test.
If you've fixed a bug or added code that should be tested, add a test to
the
      test directory!

- [ ] All new functions and code must be clearly commented and
documented.
If you do make documentation changes, make sure that the docs build and
      render correctly by running `make docs`.

- [ ] Ensure that the test suite passes, by running `make test`.

- [ ] Add a new entry to the `doc/releases/changelog-dev.md` file,
summarizing the
      change, and including a link back to the PR.

- [ ] The PennyLane source code conforms to
      [PEP8 standards](https://www.python.org/dev/peps/pep-0008/).
We check all of our code against [Pylint](https://www.pylint.org/).
      To lint modified files, simply `pip install pylint`, and then
      run `pylint pennylane/path/to/file.py`.

When all the above are checked, delete everything above the dashed
line and fill in the pull request template.


------------------------------------------------------------------------------------------------------------

**Context:**

**Description of the Change:**

**Benefits:**

**Possible Drawbacks:**

**Related GitHub Issues:**

---------

Co-authored-by: Lee James O'Riordan <mlxd@users.noreply.github.com>

.github/workflows/install_deps/action.yml

@@ -82,7 +82,7 @@ runs:
  if: inputs.install_jax == 'true'
  env:
  JAX_VERSION: ${{ inputs.jax_version != '' && format('=={0}', inputs.jax_version) || '' }}
- run: pip install "jax${{ env.JAX_VERSION}}" "jaxlib${{ env.JAX_VERSION }}"
+ run: pip install "jax${{ env.JAX_VERSION}}" "jaxlib${{ env.JAX_VERSION }}" scipy~=1.12.0
 
  - name: Install additional PIP packages
  shell: bash