fix drop redundant Page updated announcement

The SPA content swap moved focus to the swapped-in heading and also announced "Page updated" on the polite live region. Focus movement already signals the change to assistive tech, so the message was redundant noise on every workout logging navigation. Keep the transient Loading and Saving announcements; the fresh status node starts empty, so they clear when the swap lands.

Commit
dab53ca98173e778c9a2c755ec27d5a3f6dfb3c3
Author
Marius Peter <dev@marius-peter.com>
Author date
Committer
Marius Peter <dev@marius-peter.com>
Committer date
lib/web/workout_client.ml
index 7d03cb09..b4fa0655 100644..100644
@@ -96,7 +96,10 @@
96 96 heading##setAttribute (Js.string "tabindex") (Js.string "-1");
97 97 heading##focus
98 98 | None -> ());
99 Removed: announce "Page updated";
99 Added: (* No "Page updated" announcement: moving focus to the swapped-in heading
100 Added: already tells assistive tech the content changed, so a status message
101 Added: would be redundant noise. Transient "Loading"/"Saving" still clear when
102 Added: the swap lands, because the fresh status node starts empty. *)
100 103 start_timer ();
101 104 true
102 105 | _ -> false