fix: some base models cannot be selected in Azure OpenAI Service setting page (#4985)

web/app/components/header/account-setting/model-provider-page/model-modal/index.tsx

@@ -302,7 +302,7 @@ const ModelModal: FC<ModelModalProps> = ({
                 configurationMethod: configurateMethod,
               }} />
 
-              <div className='sticky bottom-0 flex justify-between items-center mt-2 -mx-2 pt-4 px-2 pb-6 flex-wrap gap-y-2 bg-white z-10'>
+              <div className='sticky bottom-0 flex justify-between items-center mt-2 -mx-2 pt-4 px-2 pb-6 flex-wrap gap-y-2 bg-white'>
                 {
                   (provider.help && (provider.help.title || provider.help.url))
                     ? (