Update some www.unicode.org URLs to use HTTPS. (GH-18912)

diff --git a/Tools/unicode/makeunicodedata.py b/Tools/unicode/makeunicodedata.py
index c9fcd83..810b285 100644
--- a/Tools/unicode/makeunicodedata.py
+++ b/Tools/unicode/makeunicodedata.py
@@ -893,9 +893,9 @@
         import urllib.request
         if version == '3.2.0':
             # irregular url structure
-            url = ('http://www.unicode.org/Public/3.2-Update/'+template) % ('-'+version,)
+            url = ('https://www.unicode.org/Public/3.2-Update/'+template) % ('-'+version,)
         else:
-            url = ('http://www.unicode.org/Public/%s/ucd/'+template) % (version, '')
+            url = ('https://www.unicode.org/Public/%s/ucd/'+template) % (version, '')
         os.makedirs(DATA_DIR, exist_ok=True)
         urllib.request.urlretrieve(url, filename=local)
     if local.endswith('.txt'):