Update pages/serverless-containers/reference-content/containers-sandbox.mdx

Co-authored-by: Rowena Jones <36301604+RoRoJ@users.noreply.github.com>

Author: SamyOubouaziz

pages/serverless-containers/reference-content/containers-sandbox.mdx

@@ -30,7 +30,7 @@ Refer to the [official gVisor documentation](https://gvisor.dev/docs/user_guide/
 
 ## Sandbox special directories
 
-In sandbox v1 and v2, some directories are mounted as `tmpfs` for temporary in-memory storage:
+In Sandbox v1 and v2, some directories are mounted as `tmpfs` for temporary in-memory storage:
 
 | Sandbox v1 |Sandbox v2 |
 |---|---|