Update latest.txt for 4.1.7 release

scripts/latest.txt

@@ -3,8 +3,8 @@
     "url":     "https://docs.wagtail.org/en/stable/releases/5.1.2.html",
     "minorUrl": "https://docs.wagtail.org/en/stable/releases/5.1.html",
     "lts": {
-        "version": "4.1.6",
-        "url": "https://docs.wagtail.org/en/stable/releases/4.1.6.html",
+        "version": "4.1.7",
+        "url": "https://docs.wagtail.org/en/v4.1.7/releases/4.1.7.html",
         "minorUrl": "https://docs.wagtail.org/en/stable/releases/4.1.html"
     }
 }