Update _includes/analytics/cloudflare.html

Swap double quotes and single quotes to match suggestions

Co-authored-by: Cotes Chung <11371340+cotes2020@users.noreply.github.com>
Signed-off-by: Hieu D <48117687+dqhntt@users.noreply.github.com>

_includes/analytics/cloudflare.html

@@ -2,6 +2,6 @@
 <script
   defer
   src="https://static.cloudflareinsights.com/beacon.min.js"
-  data-cf-beacon="{'token': '{{ site.analytics.cloudflare.id }}'}"
+  data-cf-beacon='{"token": "{{ site.analytics.cloudflare.id }}"}'
 ></script>
 <!-- End Cloudflare Web Analytics -->