Update mailing list links

The mailing list software has been updated and the links have changed.

Signed-off-by: Janos Follath <janos.follath@arm.com>
diff --git a/SUPPORT.md b/SUPPORT.md
index 1bc0695..dab7ac5 100644
--- a/SUPPORT.md
+++ b/SUPPORT.md
@@ -7,9 +7,9 @@
 - the `docs` directory in the source tree;
 - the [Mbed TLS knowledge Base](https://tls.mbed.org/kb);
 - the [Mbed TLS mailing-list
-  archives](https://lists.trustedfirmware.org/pipermail/mbed-tls/).
+  archives](https://lists.trustedfirmware.org/archives/list/mbed-tls@lists.trustedfirmware.org/).
 
 ## Asking Questions
 
 If you can't find your answer in the above sources, please use the [Mbed TLS
-mailing list](https://lists.trustedfirmware.org/mailman/listinfo/mbed-tls).
+mailing list](https://lists.trustedfirmware.org/mailman3/lists/mbed-tls.lists.trustedfirmware.org).