feat(icons): add uptimerobot (#1329)

Co-authored-by: Dashboard Icons Manager <193821040+dashboard-icons-manager[bot]@users.noreply.github.com>

tree.json

@@ -2051,6 +2051,7 @@
         "ups.png",
         "upsnap.png",
         "uptime-kuma.png",
+        "uptimerobot.png",
         "upvote-rss.png",
         "urbackup-server.png",
         "urbackup.png",
@@ -3896,6 +3897,7 @@
         "ups.svg",
         "upsnap.svg",
         "uptime-kuma.svg",
+        "uptimerobot.svg",
         "upvote-rss.svg",
         "valetudo.svg",
         "valkey.svg",
@@ -6102,6 +6104,7 @@
         "ups.webp",
         "upsnap.webp",
         "uptime-kuma.webp",
+        "uptimerobot.webp",
         "upvote-rss.webp",
         "urbackup-server.webp",
         "urbackup.webp",