qunit: Fix stylesheet link to not put up JS dialog

It would be nice to support `<link>` in this dialog, as requested
in #71, but right
now the dialog suggests `<script>` for the stylesheet which is wrong.

This only affected QUnit, in which I mistakenly wrote it this way
since commit 6e82c21 in 2018.

Ref #41.

Author: Krinkle

templates/qunit-release.hbs

@@ -1,5 +1,5 @@
 <li>
 	QUnit {{version}} -
 	{{cdnSriLink filename "script"}},
-	{{cdnSriLink theme "stylesheet"}}
+	{{cdnLink theme "stylesheet"}}
 </li>