Update my_coin.move (#18125)

## Description 

Describe the changes or additions included in this PR.

## Test plan 

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---

## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

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that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:

---------

Co-authored-by: ronny-mysten <118224482+ronny-mysten@users.noreply.github.com>

examples/move/coin/sources/my_coin.move

@@ -11,13 +11,11 @@ module examples::my_coin {
 
     // Module initializer is called once on module publish. A treasury
     // cap is sent to the publisher, who then controls minting and burning.
-    // Use #[allow(lint(share_owned))] to create editable metadata.
-    #[allow(lint(share_owned))]
     fun init(witness: MY_COIN, ctx: &mut TxContext) {
         let (treasury, metadata) = coin::create_currency(witness, 6, b"MY_COIN", b"", b"", option::none(), ctx);
-        // Share the metadata object so that it can be edited. You could instead 
-        // prevent updates to the icon_url and other metadata with public_freeze_object.
-        transfer::public_share_object(metadata);
+        // Freezing this object makes the metadata immutable, including the title, name, and icon image. 
+        // If you want to allow mutability, share it with public_share_object instead.
+        transfer::public_freeze_object(metadata);
         transfer::public_transfer(treasury, ctx.sender())
     }
 
@@ -31,4 +29,4 @@ module examples::my_coin {
         let coin = coin::mint(treasury_cap, amount, ctx);
         transfer::public_transfer(coin, recipient)
     }
-}
+}