fix php templates

templates/php/main.tf

@@ -25,7 +25,7 @@ module "php_workspace" {
   source = "../../coder-base"
 
   language = "PHP"
-  docker_image = "registry.bobert.me/anthorob/coder-images:php${data.coder_parameter.java_version.value}"
+  docker_image = "registry.bobert.me/anthorob/coder-images:php${data.coder_parameter.php_version.value}"
 
   language_metadata = [
     {