[chore] fix some docstring typos (#4815)

searx/engines/adobe_stock.py

@@ -156,7 +156,7 @@ def parse_image_item(item):
 def parse_video_item(item):
 
     # in video items, the title is more or less a "content description", we try
-    # to reduce the lenght of the title ..
+    # to reduce the length of the title ..
 
     title = item["title"]
     content = ""

searx/engines/tagesschau.py

@@ -77,7 +77,7 @@ def response(resp):
         elif item_type == 'video':
             results.append(_video(item))
         else:
-            logger.error("unknow result type: %s", item_type)
+            logger.error("unknown result type: %s", item_type)
 
     return results