[fix] engine archive is - search_url has been changed

BTW: set soft_max_redirects from *archive is* by 1, to prevent logging::

    DEBUG:httpx._client:HTTP Request: GET https://archive.is/search/?q=www.python.org "HTTP/2 302 Found"
    DEBUG:httpx._client:HTTP Request: GET https://archive.is/www.python.org "HTTP/2 200 OK"
    DEBUG:searx:archive is: ErrorContext('searx/search/processors/online.py', 110, 'count_error(self.engine_name,', None, '1 redirects, maximum: 0', ('200', 'OK', 'archive.is')) True

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/settings.yml

@@ -170,7 +170,7 @@ engines:
 
   - name : archive is
     engine : xpath
-    search_url : https://archive.is/{query}
+    search_url : https://archive.is/search/?q={query}
     url_xpath : (//div[@class="TEXT-BLOCK"]/a)/@href
     title_xpath : (//div[@class="TEXT-BLOCK"]/a)
     content_xpath : //div[@class="TEXT-BLOCK"]/ul/li
@@ -178,6 +178,7 @@ engines:
     timeout : 7.0
     disabled : True
     shortcut : ai
+    soft_max_redirects: 1
     about:
       website: https://archive.is/
       wikidata_id: Q13515725