Update sql.html

_includes/install_instructions/sql.html

@@ -6,7 +6,7 @@ <h3>SQLite</h3>
         SQL is a specialized programming language used with databases. We use the database manager called SQLite in our lessons. 
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-        We will use a database called Survey.db for the workshop. Download it from here: <a href="http://swcarpentry.github.io/sql-novice-survey/files/survey.db" target="_blank"  rel="noopener noreferrer">http://swcarpentry.github.io/sql-novice-survey/files/survey.db</a> 
+        We will use a database called Survey.db for the workshop. Download it from here: <a href="https://swcarpentry.github.io/sql-novice-survey/files/survey.db" target="_blank"  rel="noopener noreferrer">http://swcarpentry.github.io/sql-novice-survey/files/survey.db</a> 
         and place it somewhere easily accessible on your computer, such as your document folder or desktop. It will download directly, check your downloads folder.
         If you have issues downloading the file, copy and paste the url in a new browser window.
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