Shorten "No MusicBrainz ID" -> "No MB ID"

So that it's inline with other UI elements, and fits nicely in mobile UI

lib/music_library_web/live/stats_live/index.html.heex

@@ -125,7 +125,7 @@
               "ring-zinc-600/20 dark:ring-zinc-500/20"
             ]}
           >
-            <%= gettext("No MusicBrainz ID") %>
+            <%= gettext("No MB ID") %>
           </span>
           <span
             :if={track.album.musicbrainz_id in @collected_release_ids}

priv/gettext/default.pot

@@ -452,5 +452,5 @@ msgstr ""
 
 #: lib/music_library_web/live/stats_live/index.html.heex:128
 #, elixir-autogen, elixir-format
-msgid "No MusicBrainz ID"
+msgid "No MB ID"
 msgstr ""

test/music_library_web/live/stats_live/index_test.exs

@@ -186,7 +186,7 @@ defmodule MusicLibraryWeb.StatsLive.IndexTest do
       assert has_element?(
                stats_live,
                "#track-#{in_murmuration_track.scrobbled_at_uts}",
-               "No MusicBrainz ID"
+               "No MB ID"
              )
     end
   end