Correct extra install name

Need to install `test` extra installs to get pytest instead of `dev`.

.github/workflows/gempyor-ci.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Install gempyor
         run: |
           python -m pip install --upgrade pip
-          python -m pip install "flepimop/gempyor_pkg[dev]"
+          python -m pip install "flepimop/gempyor_pkg[test]"
         shell: bash
       - name: Run gempyor tests
         run: |