TST: Add Python 3.14 to test matrix #1288
Description
I noticed that Python 3.14 is not tested in https://github.com/astropy/specutils/blob/main/.github/workflows/ci_workflows.yml
{{ message }}
I noticed that Python 3.14 is not tested in https://github.com/astropy/specutils/blob/main/.github/workflows/ci_workflows.yml