Fix navbar brand link to point to / instead of /tasks

The navbar "omni" brand link points to /tasks but should point to / (the root landing page served by Caddy).

One-line fix in Omni/Task/Web/Components.hs:

Change: Lucid.a_ [Lucid.href_ "/tasks", Lucid.class_ "navbar-brand"] "omni" To: Lucid.a_ [Lucid.href_ "/", Lucid.class_ "navbar-brand"] "omni"

Key files: Omni/Task/Web/Components.hs (navbar function, around line 560) Namespace: Omni/Task.hs