config: fix camelCase

config.yaml.dist

@@ -42,10 +42,10 @@ smtp:
     port: # example: 25
     user: # example: bot
     pass: # example: groovy123
-    # host can be left empty, in which case it is recommended to fill contactEmail.
+    # host can be left empty, in which case it is recommended to fill contact_email.
 
 
-contactEmail: # example: bob@example.com. Meant for manual password reset procedures
+contact_email: # example: bob@example.com. Meant for manual password reset procedures
 
 
 # used for reverse image search

server/szurubooru/api/info_api.py

@@ -42,7 +42,7 @@ def get_info(
             'tagCategoryNameRegex': config.config['tag_category_name_regex'],
             'defaultUserRank': config.config['default_rank'],
             'enableSafety': config.config['enable_safety'],
-            'contactEmail': config.config['contactEmail'],
+            'contactEmail': config.config['contact_email'],
             'canSendMails': bool(config.config['smtp']['host']),
             'privileges':
                 util.snake_case_to_lower_camel_case_keys(