fix: Add missing save_posted check for saving posted articles

bot.py

@@ -98,8 +98,9 @@ def LoadConfigVariable(system_variable, header, key, mandatory, default_value=-1
 
  print("{0} new articles were posted. Now waiting {1} seconds...".format(newArticles, interval))
 
- with open('postedarticles.txt', 'w') as f:
- for article_id in postedArticles:
- f.write(article_id + "\n")
+ if save_posted:
+ with open('postedarticles.txt', 'w') as f:
+ for article_id in postedArticles:
+ f.write(article_id + "\n")
 
  time.sleep(interval - ((time.time() - starttime) % interval))