net/smb4k: update to 4.0.4 release (+)

What's new:

Smb4K 4.0.4 (2025-07-31):

• Fix serveral issues with the UNC-to-URL conversion in the mount dialog.
• Port to KUIServerV2JobTracker. KUIServerJobTracker is in the process of being deprecated.
• Update README.md to reflect the right location of the license files.

Smb4K 4.0.3 (2025-06-15):

• Do not copy empty credentials into the URL when reading the password, and, thus, fix the failed mounting of home shares in particular, which have no credentials.

Smb4K 4.0.2 (2025-05-15):

• Fix regression that Smb4K could not be compiled anymore with Qt versions prior to 6.8.

Smb4K 4.0.1 (2025-05-13):

• Use Q_APPLICATION_STATIC instead of Q_GLOBAL_STATIC to avoid crashes on exit (BUG #500855).

Changelog: https://invent.kde.org/network/smb4k/-/blob/4.0.4/ChangeLog