Revert "try(ci): remove cache for media"

This reverts commit 3b01efa.

Author: jeertmans

.github/workflows/pages.yml

@@ -48,6 +48,12 @@ jobs:
         sudo apt-get install libcairo2-dev libpango1.0-dev ffmpeg freeglut3-dev
     - name: Install local Python package
       run: poetry install --extras=manim --with docs
+    - name: Restore cached media
+      id: cache-media-restore
+      uses: actions/cache/restore@v3
+      with:
+        path: media
+        key: ${{ runner.os }}-media
     - name: Build animations
       run: |
         poetry run manim example.py ConvertExample BasicExample ThreeDExample
@@ -58,6 +64,18 @@ jobs:
         poetry run manim-slides convert -v DEBUG ThreeDExample docs/source/_static/three_d_example.html -ccontrols=true
     - name: Show docs/source/_static/ dir content (video only)
       run: tree -L 3 docs/source/_static/ -P '*.mp4'
+    - name: Clear cache
+      run: |
+        gh extension install actions/gh-actions-cache
+        gh actions-cache delete ${{ steps.cache-media-restore.outputs.cache-primary-key }} --confirm || true
+      env:
+        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    - name: Save media to cache
+      id: cache-media-save
+      uses: actions/cache/save@v3
+      with:
+        path: media
+        key: ${{ steps.cache-media-restore.outputs.cache-primary-key }}
     - name: Build docs
       run: cd docs && poetry run make html
     - name: Upload artifact