Update actions/cache action to v4

Author: renovate[bot]

.github/actions/prepare/action.yml

@@ -27,7 +27,7 @@ runs:
       run: |
         echo "pnpm_cache_dir=$(pnpm store path)" >> $GITHUB_OUTPUT
 
-    - uses: actions/cache@v3
+    - uses: actions/cache@v4
       name: Setup pnpm cache
       with:
         path: ${{ steps.pnpm-cache.outputs.pnpm_cache_dir }}

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
         uses: ./.github/actions/prepare
 
       - name: Cache build artifacts
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: '**/dist'
           key: build-artifacts-${{ github.sha }}