[CI] Use julia-actions/cache workflow only for the docs (#362)

We can't cache the artifacts when running the main tests because that'd require
over 10 GiB, which is the maximum GHA can handle, so at least we cache stuff for
the docs.

Author: giordano

.github/workflows/ci.yml

@@ -61,16 +61,17 @@ jobs:
         with:
           version: ${{ matrix.julia-version }}
           arch: x64
-      - uses: julia-actions/cache@v1
-        # For the time being cache artifacts only for squashfs, we need too much
-        # storage for the unpacked shards
-        if: ${{ matrix.squashfs == true }}
-        with:
-          # Reserve entire cache to artifacts
-          cache-name: ${{ matrix.squashfs }}
-          cache-artifacts: "true"
-          cache-packages: "false"
-          cache-registries: "false"
+      # We can't cache artifacts at the moment, it'd require more than 10 GiB.
+      # - uses: julia-actions/cache@v1
+      #   # For the time being cache artifacts only for squashfs, we need too much
+      #   # storage for the unpacked shards
+      #   if: ${{ matrix.squashfs == true }}
+      #   with:
+      #     # Reserve entire cache to artifacts
+      #     cache-name: ${{ matrix.squashfs }}
+      #     cache-artifacts: "true"
+      #     cache-packages: "false"
+      #     cache-registries: "false"
       - uses: julia-actions/julia-buildpkg@latest
       - name: System info
         run: |
@@ -101,6 +102,7 @@ jobs:
       JULIA_PKG_SERVER: ""
     steps:
       - uses: actions/checkout@v4
+      - uses: julia-actions/cache@v1
       - uses: julia-actions/setup-julia@latest
         with:
           version: "1.7"