github-actions: cleaned up generate-rst, added using conda

Signed-off-by: Grzegorz Latosinski <glatosinski@antmicro.com>

.github/workflows/generate-rst.yml

@@ -16,11 +16,10 @@ jobs:
 
       - name: Generate cells READMEs
         run: |
-          sudo apt update
-          sudo apt install -y python3 python3-pip git tar gzip
-          pip3 install docutils sphinx
-
           SUBMODULE_VERSION=latest make submodules -j3 || make submodules -j1
+
+          make env
+
           git submodule foreach 'git checkout master'
           scripts/python-skywater-pdk/skywater_pdk/cell_list.py libraries/*/latest/
           scripts/python-skywater-pdk/skywater_pdk/cell-readme-generate.py libraries/*/latest/cells/*
@@ -31,9 +30,3 @@ jobs:
           git config --global user.email "action@github.com"
           git config --global user.name "Github Action"
           git submodule foreach 'git commit -m "$DAT"'
-
-      - uses: actions/upload-artifact@v2
-        with:
-          name: cells-docs
-          path: libs.tar.gz
-