Update Hathor Wallet (#1464)

This closes #1463

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<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Medium Risk**
> Registry update changes the distributed Snap version and checksum,
which can impact all users installing/updating it. Review should verify
the new package artifact and checksum are correct.
> 
> **Overview**
> Updates the Snap registry entry for **Hathor Wallet**
(`npm:@hathor/snap`) by replacing version `0.3.0` with `0.4.2` and
updating the associated `checksum` to match the new release.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
cdfbbb4. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: Montoya

src/registry.json

@@ -5361,8 +5361,8 @@
         ]
       },
       "versions": {
-        "0.3.0": {
-          "checksum": "jElN00ss8XPpcCoAAgAw+42WwL5gez40nqqRRJPBLkA="
+        "0.4.2": {
+          "checksum": "P5zK+T8afxLRSILibyFCD8RnkeoD3U1mrtaIQ7UDupw="
         }
       }
     },