SCRIPTS: announce-release: add URL of dev packages

This is the shortened URL of the nightly builds maintained by William,
let's have them in announce messages.

(cherry picked from commit 02df95e9388bb136c59a19290436175acf348b53)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 3f640115d390ee4aeab7219227258ce299154303)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed