Removed dead metrics action, updated build for newer action versions

Author: dragonmantank

.github/workflows/build.yml

@@ -6,7 +6,7 @@ jobs:
             - ubuntu-latest
         strategy:
             matrix:
-                php: ['8.1', '8.2', '8.3']
+                php: ['8.1', '8.2', '8.3', '8.4']
         steps:
             - name: Configure Git
               if: ${{ matrix.os == 'windows-latest' }}
@@ -15,7 +15,7 @@ jobs:
                   git config --ystem core.eol lf
 
             - name: Checkout
-              uses: actions/checkout@v2
+              uses: actions/checkout@v4
 
             - name: Setup PHP
               uses: shivammathur/setup-php@v2