Fix icon font loading issue when BOOTSTRAP_SERVE_LOCAL is True

This commit resolves an issue where the bootstrap-icons.min.css was not loading correctly when 'BOOTSTRAP_SERVE_LOCAL' was set to True.

Author: pinguincoding

flask_bootstrap/__init__.py

@@ -131,7 +131,7 @@ def load_icon_font_css(self):
         """
         serve_local = current_app.config['BOOTSTRAP_SERVE_LOCAL']
         if serve_local:
-            icons_url = url_for('bootstrap.static', filename='font/bootstrap-icons.min.css')
+            icons_url = url_for('bootstrap.static', filename='css/font/bootstrap-icons.min.css')
         else:
             icons_url = f'{CDN_BASE}/bootstrap-icons@{self.icons_version}/font/bootstrap-icons.min.css'
         css = f'<link rel="stylesheet" href="{icons_url}">'