Set min date for titer plots to Feb 1, 2024

Fixes the minimum date for titer measurements to show in plots to Feb 1,
2024 for consistency with other groups.

profiles/nextflu-private/antigenic_distances.smk

@@ -27,7 +27,7 @@ rule plot_antigenic_distances_between_strains:
     log:
         "logs/plot_antigenic_distances_between_strains_{build_name}_{segment}_{titer_collection}.txt"
     params:
-        min_test_date=2023.66,
+        min_test_date=2024.0833,
         title=get_titer_collection_title,
         clade_color_field="subclade_test",
         auspice_config_color_field="subclade",