Add YouTrack detection

This can be tested on the [official instance](https://youtrack.jetbrains.com/issues),
or on the [cisco one](https://trex-tgn.cisco.com/youtrack/dashboard)

src/apps.json

@@ -8403,6 +8403,18 @@
 			"icon": "Yoast SEO.png",
 			"website": "yoast.com"
 		},
+		"YouTrack": {
+			"cats": [
+				13
+			],
+			"html": [
+				"no-title=\"YouTrack\">",
+				"data-reactid=\"[^\"]+\">youTrack ([0-9.]+)<\\;version\\1",
+				"type=\"application/opensearchdescription\\+xml\" title=\"YouTrack\"/>"
+			],
+			"icon": "YouTrack.png",
+			"website": "www.jetbrains.com/youtrack/"
+		},
 		"YouTube": {
 			"cats": [
 				14