feat(docs): mention entry functions in visibility

Signed-off-by: salaheldinsoliman <[email protected]>

docs/content/developer/iota-101/move-overview/visibility.mdx

@@ -3,7 +3,7 @@
 Every module member has a visibility. By default, all module members are _private_ - meaning they
 are only accessible within the module they are defined in. However, you can add a visibility
 modifier to make a module member _public_ - visible outside the module, or _public(package)_ -
-visible in the modules within the same package, or _entry_ - can be called from a transaction but
+visible in the modules within the same package, or [_entry_](./entry-functions.mdx) - can be called from a transaction but
 can't be called from other modules.
 
 ## Internal Visibility