update latest.txt for 3.0.1

scripts/latest.txt

@@ -1,7 +1,7 @@
 {
-    "version": "2.16.2",
-    "url":     "https://docs.wagtail.org/en/stable/releases/2.16.2.html",
-    "minorUrl": "https://docs.wagtail.org/en/stable/releases/2.16.html",
+    "version": "3.0.1",
+    "url":     "https://docs.wagtail.org/en/stable/releases/3.0.1.html",
+    "minorUrl": "https://docs.wagtail.org/en/stable/releases/3.0.html",
     "lts": {
         "version": "2.15.5",
         "url": "https://docs.wagtail.org/en/stable/releases/2.15.5.html",