misc: rename namespace jami to namespace dhtnet

Change-Id: I904ec8fa1f35dfdcf1aabd5f1ec8d95989ad0696
diff --git a/src/turn/turn_cache.cpp b/src/turn/turn_cache.cpp
index 12dfe8b..f351347 100644
--- a/src/turn/turn_cache.cpp
+++ b/src/turn/turn_cache.cpp
@@ -236,4 +236,4 @@
     }
 }
 
-} // namespace jami
+} // namespace dhtnet