Fix styling of strapline on homepage (#4639)

Fixes #4634

## Screenshots

<details><summary>Before</summary>

<img width="554" height="431" alt="Screenshot 2025-11-26 at 16-20-33
Demo Apply Homepage ACME"
src="https://github.com/user-attachments/assets/1c48be33-59ac-44bb-ab67-87a53afef83e"
/>


</details> 

<details><summary>After</summary>

<img width="557" height="425" alt="Screenshot 2025-11-26 at 16-19-20
Demo Apply Homepage ACME"
src="https://github.com/user-attachments/assets/365000ed-d295-4305-8921-8fb9d52d7d77"
/>


</details>

Author: bmispelon

hypha/home/templates/home/home.html

@@ -13,7 +13,7 @@ <h1 class="font-bold text-h00">
         </h1>
 
         {% if settings.core.SystemSettings.home_strapline %}
-            <p class="mb-8 text-fg-muted text-pretty">{{ settings.core.SystemSettings.home_strapline|nh3|safe }}</p>
+            <div class="mb-8 text-fg-muted text-pretty prose prose-a:text-primary">{{ settings.core.SystemSettings.home_strapline|nh3|safe }}</div>
         {% endif %}
 
         {% if funds %}