feat: added support for authenticating API requests

Author: 4lch4

action.yml

@@ -8,6 +8,9 @@ inputs:
   http_url:
     description: 'A URL containing data to fetch.'
     required: false
+  authorization:
+    description: 'A string to send as a header for authorizing API requests.'
+    required: false
   sql_connstring:
     description: 'A connection string for making a SQL query.'
     required: false