add --no-deps in backfill workflow

Author: ndgrigorian

.github/workflows/backfill-docs.yml

@@ -98,7 +98,7 @@ jobs:
               -DDPCTL_USE_MULTIVERSION_TEMPLATE=ON                                   \
               -DDoxyrest_DIR="$(pwd)/doxyrest-2.1.2-linux-amd64"                     \
               -DCMAKE_VERBOSE_MAKEFILE=ON
-          python -m pip install -e . --no-build-isolation
+          python -m pip install -e . --no-build-isolation --no-deps
           python -c "import dpctl; print(dpctl.__version__)" || exit 1
           pushd "$(find _skbuild -name cmake-build)" || exit 1
           cmake --build . --target Sphinx || exit 1