[fix] add back missing languages & regions (followup of PR #1071)

In PR #1071 the language catalog of dailymotion has been cleaned up, before
there had been over 7000 "languages" in the catalog.

As a side effect of this clean-up the language & region catalog in SearXNG has
been reduced [1].

This patch reduce the ``min_engines_per_lang`` from 13 to 12 to get the missed
languages back in language & region catalog of SearXNG.

[1] 3bb62823ec (diff-f3f00db0f87f95b882624a192e0aac21525638af0b18c9514e765fcf1991678d)

Requested-by: @tiekoetter in a Matrix chat
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searxng_extra/update/update_languages.py

@@ -117,7 +117,8 @@ def get_territory_name(lang_code):
     country_name = None
     locale = get_locale(lang_code)
     try:
-        country_name = locale.get_territory_name()
+        if locale is not None:
+            country_name = locale.get_territory_name()
     except FileNotFoundError as exc:
         print("ERROR: %s --> %s" % (locale, exc))
     return country_name
@@ -190,7 +191,7 @@ def join_language_lists(engines_languages):
 
 # Filter language list so it only includes the most supported languages and countries
 def filter_language_list(all_languages):
-    min_engines_per_lang = 13
+    min_engines_per_lang = 12
     min_engines_per_country = 7
     # pylint: disable=consider-using-dict-items, consider-iterating-dictionary
     main_engines = [