rebar.config: Switch from git://git.osmocom.org to https://gitea

The old git URLs are still kept for compatibility, but we should
use the official git repository (now in gitea).

Change-Id: If9b70c42753e17f957241fe9be514163aee9e22d
diff --git a/rebar.config b/rebar.config
index b0fdebd..69013aa 100644
--- a/rebar.config
+++ b/rebar.config
@@ -3,8 +3,8 @@
 {deps, [
 	{setup, "2.0.2"},
 	{lager, {git, "https://github.com/erlang-lager/lager", {tag, "3.9.1"}}},
-	{osmo_ss7, {git, "git://git.osmocom.org/erlang/osmo_ss7", {branch, "master"}}},
-	{osmo_gsup,  {git, "git://git.osmocom.org/erlang/osmo_gsup", {branch, "master"}}}
+	{osmo_ss7, {git, "https://gitea.osmocom.org/erlang/osmo_ss7", {branch, "master"}}},
+	{osmo_gsup,  {git, "https://gitea.osmocom.org/erlang/osmo_gsup", {branch, "master"}}}
 ]}.
 
 {minimum_otp_vsn, "20.3"}.