Don't use setup.py in CI as it no longer exists

Author: jbcoe

.github/workflows/test_and_deploy.yml

@@ -48,11 +48,11 @@ jobs:
         with:
           python-version: '3.10'
       - name: Ensure latest pip, wheel & setuptools
-        run: python -m pip install -q --upgrade pip wheel setuptools
+        run: python -m pip install -q --upgrade pip build wheel setuptools
       - uses: actions/checkout@v4
       - name: Generate sdist
         run: |
-          NLE_RELEASE_BUILD=1 python setup.py sdist
+          NLE_RELEASE_BUILD=1 python -m build sdist
       - name: Install from sdist
         run: |
           SDISTNAME=$(ls dist/)
@@ -74,11 +74,11 @@ jobs:
         with:
           python-version: 3.13
       - name: Ensure latest pip, wheel & setuptools
-        run: python -m pip install -q --upgrade pip wheel setuptools
+        run: python -m pip install -q --upgrade pip build wheel setuptools
       - uses: actions/checkout@v4
       - name: Generate sdist
         run: |
-          NLE_RELEASE_BUILD=1 python setup.py sdist
+          NLE_RELEASE_BUILD=1 python -m build sdist
       - name: Install from sdist
         run: |
           SDISTNAME=$(ls dist/)