Fix publish in CI (#12)

* fix docs build in CI

* fix docs build in CI

* fix publish action in CI

Author: davorrunje

.github/workflows/publish.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
-      - uses: actions/cache@v1
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cache/pypoetry