fix: syntax error

Author: CompuIves

packages/projects-docs/pages/sdk/sessions.mdx

@@ -65,7 +65,7 @@ Every session will have the same filesystem as the global session. This means th
 
 <Callout>
 The `~/.private` folder will not be persisted between restarts of the sandbox. This means that files inside this folder will disappear between restarts. 
-</Callout
+</Callout>
 
 ## Use Cases