docs(ssl): merge main + regenerate sitemap.xml

Bring the branch up to date with main (it was ~1485 commits behind, predating
the sitemap tooling + frontmatter check) and regenerate sitemap.xml so it
includes the new SSL monitor pages. Fixes the static-docs-checks failure.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013AYwkvoaANQTH5dGStbBj2

Author: danielpaulus

sitemap.xml

@@ -891,6 +891,9 @@
   <url>
     <loc>https://www.checklyhq.com/docs/constructs/sms-alert-channel/</loc>
   </url>
+  <url>
+    <loc>https://www.checklyhq.com/docs/constructs/ssl-monitor/</loc>
+  </url>
   <url>
     <loc>https://www.checklyhq.com/docs/constructs/status-page/</loc>
   </url>
@@ -1068,6 +1071,12 @@
   <url>
     <loc>https://www.checklyhq.com/docs/detect/uptime-monitoring/overview/</loc>
   </url>
+  <url>
+    <loc>https://www.checklyhq.com/docs/detect/uptime-monitoring/ssl-monitors/configuration/</loc>
+  </url>
+  <url>
+    <loc>https://www.checklyhq.com/docs/detect/uptime-monitoring/ssl-monitors/overview/</loc>
+  </url>
   <url>
     <loc>https://www.checklyhq.com/docs/detect/uptime-monitoring/tcp-monitors/configuration/</loc>
   </url>