Corrected duplication of 8.4 to 8.3.

Author: ionux

.github/workflows/php.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: ['7.4', '8.0', '8.1', '8.2', '8.4', '8.4']
+        php: ['7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
     steps:
       - name: Checkout code
         uses: actions/checkout@v3