Fix submodule path (#802)

pblazej · web-flow · commit 57448c954a87 · 2025-10-02T14:44:55.000+02:00
So that it can be resolved by SPM for a fresh build.
diff --git a/.gitmodules b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "protocol"]
 	path = protocol
-	url = ../protocol.git
+	url = https://github.com/livekit/protocol.git
