docs: revise medusa container chapter (#10192)

www/apps/book/app/learn/advanced-development/modules/container/page.mdx

@@ -1,13 +1,11 @@
 export const metadata = {
-  title: `${pageNumber} Module's Container`,
+  title: `${pageNumber} Module Container`,
 }
 
 # {metadata.title}
 
 In this chapter, you'll learn about the module's container and how to resolve resources in that container.
 
-## Module's Container
-
 Since modules are isolated, each module has a local container only used by the resources of that module.
 
 So, resources in the module, such as services or loaders, can only resolve other resources registered in the module's container.