invalid-label-bot: Reword the invalid label message

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

.github/workflows/invalid-label-bot.yaml

@@ -1,4 +1,4 @@
-# Enable the github stale issue bot tracker
+# Add a comment to github issues marked with the invalid label
 name: "Add comment to issues marked invalid"
 on:
   issues:
@@ -13,9 +13,13 @@ jobs:
           script: |
             if (context.payload.label.name != "invalid")
               return;
-            msg = "Unfortunately, it appears the directions at"
+            msg = "It looks like this ticket is a request for help"
+                + " (or similar)."
+                + " Many helpful people will not see your message here and you"
+                + " are unlikely to get a useful response."
+                + " Please close this ticket and follow the contact directions"
+                + " at:
                 + " https://www.klipper3d.org/Contact.html"
-                + " were not followed for this issue.\n"
                 + "\n"
                 + "We use github to share the results of work done to"
                 + " improve Klipper. We don't use github for requests."