chore: Update bib sources text in home view (#462)

main/templates/browse/home.html

@@ -40,8 +40,7 @@
  <div class="{% include "_side_block_classes.html" %} md:row-span-3">
  <p class="text-xs m-4">
  {% if browsable_datasets %}
- Bibliographic&nbsp;items
- are indexed among&nbsp;sources:
+ Bibliographic&nbsp;item&nbsp;sources:
  {% for ds_id in browsable_datasets %}
  <a class="{% if dataset_id == ds_id %}font-bold{% endif %}" href="{% url "browse_dataset" ds_id %}"
  >{{ ds_id }}</a>{% if not forloop.last %}, {% endif %}