Upgrade checkout actions to v4 (bis)

Author: PowerKiKi

.github/workflows/main.yml

@@ -21,7 +21,7 @@ jobs:
           coverage: none
 
       - name: Cache composer dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@v3
         with:
           path: ~/.cache/composer
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
@@ -53,7 +53,7 @@ jobs:
           tools: cs2pr
 
       - name: Cache composer dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@v3
         with:
           path: ~/.cache/composer
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
@@ -78,7 +78,7 @@ jobs:
           coverage: none
 
       - name: Cache composer dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@v3
         with:
           path: ~/.cache/composer
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
@@ -105,7 +105,7 @@ jobs:
           coverage: pcov
 
       - name: Cache composer dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@v3
         with:
           path: ~/.cache/composer
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}