Update github actions

Author: fabianaromagnoli

.github/workflows/build.yml

@@ -29,7 +29,7 @@ jobs:
                 with:
                     stack-version: 7.4.1
 
-            -   uses: actions/checkout@v2
+            -   uses: actions/checkout@v4
                 with:
                     fetch-depth: 0 # This is needed for Roave BC check
 
@@ -44,7 +44,7 @@ jobs:
                 run: echo "::set-output name=dir::$(composer config cache-files-dir)"
 
             -   name: Cache Composer
-                uses: actions/cache@v2
+                uses: actions/cache@v4
                 with:
                     path: ${{ steps.composer-cache.outputs.dir }}
                     key: ${{ runner.os }}-php-${{ matrix.php }}-composer-${{ hashFiles('**/composer.json **/composer.lock') }}