Update jquery to v4

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

_includes/head.html

@@ -26,7 +26,7 @@
     <!-- github star button -->
     <script async defer src="https://buttons.github.io/buttons.js"></script>
 
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/4.0.0/jquery.min.js"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-cookie/1.4.1/jquery.cookie.min.js"></script>