Correct free disk space text (e2b-dev#502)

Corrects the text in docs regarding the free disks space

Author: mlejva

apps/web/src/app/(docs)/docs/filesystem/page.mdx

@@ -1,6 +1,6 @@
 # Filesystem
 
-Each E2B Sandbox has its own isolated filesystem with 5GB of disk space.
+Each E2B Sandbox has its own isolated filesystem. The [Hobby tier](https://e2b.dev/pricing) sandboxes come with 1 GB of the free disk space and [Pro tier](https://e2b.dev/pricing) sandboxes come with 5 GB.
 
 With E2B SDK you can:
 - [Read and write files to the sandbox.](/docs/filesystem/read-write)