fix mailing list reference to use mailman3 path

diff --git a/doc/motortest-intro.inc b/doc/motortest-intro.inc
index fa30cb98cf47e42a44257d242e0970013dd77467..85776a25463544baa5f7ee9390b71229678d0276 100644 (file)
--- a/doc/motortest-intro.inc
+++ b/doc/motortest-intro.inc
@@ -23,5 +23,5 @@ Because documentation is just as prone as software to contain “bugs”, and
 can always be improved… If you have questions that aren't answered in this 
 manual, or just need a little help figuring things out, we strongly suggest 
 joining the Altus Metrum user email list, which you can do by visiting 
-https://lists.gag.com/mailman/listinfo/altusmetrum.
+https://lists.gag.com/mailman3.