Fix enum case registration

An EnumCaseName::__toString() was added to the PHP 8.5 branch returning the FQCN of the enum case, which worked fine, but in the meanwhile, support for enum registration was added to master which implicitly relied on the  EnumCaseName::__toString() method to return only the name of the case.

That's why the "Verify the generated files are up to date" step was failing until this fix.

Author: kocsismate

build/gen_stub.php

@@ -3529,7 +3529,7 @@ public function getCDeclarations(): string
 
         $i = 1;
         foreach ($this->enumCaseInfos as $case) {
-            $cName = 'ZEND_ENUM_' . str_replace('\\', '_', $this->name->toString()) . '_' . $case->name;
+            $cName = 'ZEND_ENUM_' . str_replace('\\', '_', $this->name->toString()) . '_' . $case->name->case;
             $code .= "\t{$cName} = {$i},\n";
             $i++;
         }