Fix reference of LINE Bot

Author: pan93412

notifier.rst

@@ -1101,6 +1101,7 @@ is dispatched. Listeners receive a
 .. _`Iqsms`: https://github.com/symfony/symfony/blob/{version}/src/Symfony/Component/Notifier/Bridge/Iqsms/README.md
 .. _`iSendPro`: https://github.com/symfony/symfony/blob/{version}/src/Symfony/Component/Notifier/Bridge/Isendpro/README.md
 .. _`KazInfoTeh`: https://github.com/symfony/symfony/blob/{version}/src/Symfony/Component/Notifier/Bridge/KazInfoTeh/README.md
+.. _`LINE Bot`: https://github.com/symfony/symfony/blob/{version}/src/Symfony/Component/Notifier/Bridge/LineBot/README.md
 .. _`LINE Notify`: https://github.com/symfony/symfony/blob/{version}/src/Symfony/Component/Notifier/Bridge/LineNotify/README.md
 .. _`LightSms`: https://github.com/symfony/symfony/blob/{version}/src/Symfony/Component/Notifier/Bridge/LightSms/README.md
 .. _`LinkedIn`: https://github.com/symfony/symfony/blob/{version}/src/Symfony/Component/Notifier/Bridge/LinkedIn/README.md