Update ci.yml

Author: DenisSolicen

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
           python-version: 3.x
@@ -28,4 +28,4 @@ jobs:
       - uses: actions/cache/save@v4
         with:
           key: mkdocs-material-${{ hashfiles('.cache/**') }}
-          path: ~/.cache
+          path: ~/.cache