update php for sdk generator

Author: jenschude

.github/workflows/sdks.yml

@@ -96,7 +96,7 @@ jobs:
         if: ${{ matrix.language == 'php' }}
         uses: shivammathur/setup-php@v2
         with:
-          php-version: "7.4"
+          php-version: "8.4"
           coverage: pcov
           extensions: json, mbstring, intl
           tools: composer