fix regex

The regex in config.yaml doesn't need to be escaped twice.

src/cgnappointments/config_template.yaml

@@ -18,7 +18,7 @@ locations:
 csv_name: 'appointments.csv'
 
 # Regex to extract the date from the website
-date_regex: '(\\d{2}\\.\\d{2}\\.\\d{4}\\s\\d{2}:\\d{2})'
+date_regex: '(\d{2}\.\d{2}\.\d{4}\s\d{2}:\d{2})'
 
 # Date format to store the date in the CSV file (should match the date_regex)
 date_format: '%d.%m.%Y %H:%M'