Use actions/cache@v4 in GitHub workflow ci.yml.

https://github.blog/changelog/2024-12-05-notice-of-upcoming-releases-and-breaking-changes-for-github-actions/#actions-cache-v1-v2-and-actions-toolkit-cache-package-closing-down

Author: kevindecapite

.github/workflows/ci.yml

@@ -49,7 +49,7 @@ jobs:
         run: echo "::set-output name=date::$(date +'%Y-%m')"
 
       - name: Cache composer dependencies
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ steps.key-date.outputs.date }}-${{ hashFiles('composer.json') }}
@@ -103,7 +103,7 @@ jobs:
         run: echo "::set-output name=date::$(date +'%Y-%m')"
 
       - name: Cache composer dependencies
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ steps.key-date.outputs.date }}-${{ hashFiles('composer.json') }}
@@ -138,7 +138,7 @@ jobs:
         run: echo "::set-output name=date::$(date +'%Y-%m')"
 
       - name: Cache composer dependencies
-        uses: actions/cache@v1
+        uses: actions/cache@v4
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ steps.key-date.outputs.date }}-${{ hashFiles('composer.json') }}