Tune the "dark gray" font color in the webui to make it more readable (#6078)

Tune the "dark gray" font color in the LocalAI webui to make it more readable.

Author: lxnay

core/http/static/general.css

@@ -68,7 +68,7 @@ ul {
 
 li {
     font-size: 0.875rem; /* Small text size */
-    color: #4a5568; /* Dark gray text */
+    color: #aab2c7; /* Dark gray text */
    /*  background-color: #f7fafc; Very light gray background */
     border-radius: 0.375rem; /* Rounded corners */
     padding: 0.5rem; /* Padding inside each list item */