Update and rename ext-matrix-tests-php83.yml to ext-matrix-tests-php84.yml

Author: crazywhalecc

.github/workflows/ext-matrix-tests-php83.yml renamed to .github/workflows/ext-matrix-tests-php84.yml

@@ -1,4 +1,4 @@
-name: "Extension matrix tests PHP 8.3"
+name: "Extension matrix tests PHP 8.4"
 
 on:
   workflow_dispatch:
@@ -82,7 +82,7 @@ jobs:
           - zlib
           - zstd
         php-version:
-          - "8.3"
+          - "8.4"
         operating-system:
           - "ubuntu-latest"
           #- "macos-13"