chore: update announce bar

Author: SWHL

overrides/main.html

@@ -1,7 +1,7 @@
 {% extends "base.html" %}
 
 {% block announce %}
-    <p class="banner"> 👍️ RapidOCR 发布 v3.7.0 → <a href="https://rapidai.github.io/RapidOCRDocs/latest/changelog/v3.7.0/" target="_blank">link</a></p>
+    <p class="banner"> 👍️ RapidOCR 发布 v3.8.0 → <a href="https://rapidai.github.io/RapidOCRDocs/latest/changelog/v3.8.0/" target="_blank">link</a></p>
 {% endblock %}
 
 {% block outdated %}