bpo-25910: Fixes redirection from http to https (#4674)

diff --git a/Doc/library/sqlite3.rst b/Doc/library/sqlite3.rst
index c7b9af4..e7676a9 100644
--- a/Doc/library/sqlite3.rst
+++ b/Doc/library/sqlite3.rst
@@ -107,7 +107,7 @@
       The SQLite web page; the documentation describes the syntax and the
       available data types for the supported SQL dialect.
 
-   http://www.w3schools.com/sql/
+   https://www.w3schools.com/sql/
       Tutorial, reference and examples for learning SQL syntax.
 
    :pep:`249` - Database API Specification 2.0