Added the integrity value of the CDN stylesheet links in the base template of the test site.

tests/test_site/templates/base.html

@@ -25,9 +25,9 @@ First written: 2023/1/27
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta name="author" content="{{ "imacat" }}" />
-  <link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" crossorigin="anonymous">
+  <link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" integrity="sha384-rbsA2VBKQhggwzxH7pPCaAqO46MgnOM80zW1RWuH61DGLwZJEdK2Kadq2F9CUG65" crossorigin="anonymous">
-  <link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6.4.0/css/all.min.css" crossorigin="anonymous">
+  <link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6.4.0/css/all.min.css" integrity="sha384-iw3OoTErCYJJB9mCa8LNS2hbsQ7M3C0EpIsO/H5+EGAkPGc6rk+V8i04oW/K5xq0" crossorigin="anonymous">
-  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@eonasdan/tempus-dominus@6.7.7/dist/css/tempus-dominus.min.css" crossorigin="anonymous">
+  <link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/@eonasdan/tempus-dominus@6.7.7/dist/css/tempus-dominus.min.css" integrity="sha384-l66rSL7gUubrdJxFRbXUo/tO7eNPAcCiZXFs/Xl147146xNqQ1qt4oPW6jlVezsS" crossorigin="anonymous">
   {% block styles %}{% endblock %}
   <script src="{{ url_for("babel_catalog") }}"></script>
   <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-kenU1KFdBIe4zVF0s0G1M5b4hcpxyD9F7jL+jjXkk+Q2h455rYXK/7HAuoJl+0I4" crossorigin="anonymous"></script>