docs: Update copy for Notion connection upgrade dialog (#634)

Author: dvanoni

src/locale/en-US/notero.ftl

@@ -16,7 +16,7 @@ notero-preferences-notion-disconnect-dialog-title = Disconnect Notion Workspace
 notero-preferences-notion-disconnect-dialog-text = Disconnecting your Notion workspace will prevent further syncing. It will not remove any content that has already been synced.
 notero-preferences-notion-upgrade-button = Upgrade Connection…
 notero-preferences-notion-upgrade-dialog-title = Upgrade Notion Connection
-notero-preferences-notion-upgrade-dialog-text = Notero has evolved into a Notion public integration, enabling enhanced features and security. To upgrade, click OK and you'll be redirected to Notion to authorize the new Notero integration. This one-time process enables new capabilities like multi-workspace support. After completing the upgrade, you can safely remove your previous internal integration.
+notero-preferences-notion-upgrade-dialog-text = Notero has evolved into a Notion public integration, enabling enhanced features and security. To upgrade, click OK and you'll be redirected to Notion to authorize the new Notero integration. After completing this one-time process, you can safely delete your previous internal integration. See the Notero README for more details.
 notero-preferences-notion-workspace = Workspace: { $workspace-name }
 notero-preferences-notion-database = Database:
 

src/locale/zh-CN/notero.ftl

@@ -16,7 +16,7 @@ notero-preferences-notion-disconnect-dialog-title = 断开 Notion 工作区
 notero-preferences-notion-disconnect-dialog-text = 断开 Notion 工作区连接将阻止进一步同步。它不会删除任何已同步的内容。
 notero-preferences-notion-upgrade-button = 升级连接…
 notero-preferences-notion-upgrade-dialog-title = 升级 Notion 连接
-notero-preferences-notion-upgrade-dialog-text = Notero 已发展成为 Notion 公共集成，从而增强了功能和安全性。要升级，请单击“确定”，您将被重定向到 Notion 以授权新的 Notero 集成。此一次性过程可启用新功能，例如多工作区支持。完成升级后，您可以安全地删除以前的内部集成。
+notero-preferences-notion-upgrade-dialog-text = Notero 已发展成为 Notion 公共集成，从而实现了增强的功能和安全性。要升级，请单击“确定”，您将被重定向到 Notion 以授权新的 Notero 集成。完成此一次性过程后，您可以安全地删除之前的内部集成。有关更多详细信息，请参阅 Notero README。
 notero-preferences-notion-workspace = 工作区： { $workspace-name }
 notero-preferences-notion-database = 数据库: