fix html meta link

Author: yvess

django/gsmap/models.py

@@ -244,7 +244,7 @@ def save_meta(storage):
         proto = 'https' if settings.USE_HTTPS else 'http'
         meta = f'''
 <meta name="og:title" content="{instance.title}">
-<meta name="og:url" content="{instance.get_absolute_link()}">
+<meta name="og:url" content="{proto}://{domain}{instance.get_absolute_url()}">
 <meta name="og:image" content="{proto}://{domain}/{instance.image_facebook()}">
 <meta name="twitter:image" content="{proto}://{domain}/{instance.image_twitter()}">
 '''