screenshot_config: send cache_ttl as plain int, not bool-formatted string

Follow-up to the previous commit: the field type was fixed but the
to_api_params() body still ran cache_ttl through _bool_to_http(),
which coerces to "True"/"False" strings. Pass the raw int instead.

Author: jjsaunier

scrapfly/screenshot_config.py

@@ -155,9 +155,9 @@ def to_api_params(self, key:str) -> Dict:
 
         if self.cache is not None:
             params['cache'] = self._bool_to_http(self.cache)
-            
+
             if self.cache_ttl is not None:
-                params['cache_ttl'] = self._bool_to_http(self.cache_ttl)
+                params['cache_ttl'] = self.cache_ttl
 
             if self.cache_clear is not None:
                 params['cache_clear'] = self._bool_to_http(self.cache_clear)