Refactor year handling in default layout

Updated year conditionals to include specific handling for 2025 and 2026.

Author: cmezzina

_layouts/default.html

@@ -24,9 +24,13 @@
       <!-- Create variable containing year of the website -->
       {% assign year = page.url | slice: 1, 4 | times: 1 %}
 
-      <h1> {% year %}</h1>
       <!-- Include banner + navigation menu for 2025 and newer websites -->
-      {% if year >= 2025 %}
+      {% if year == 2025 %}
+        {% assign fileName = "headers/" | append: year | append: ".html" %}
+        {% include {{fileName}} %}
+      {% endif %}
+
+      {% if year == 2026 %}
         {% assign fileName = "headers/" | append: year | append: ".html" %}
         {% include {{fileName}} %}
       {% endif %}