src: rename namespace as chronochat

Change-Id: Idf390b1b2047c912735014d078ce099cf95026e6
diff --git a/src/validator-invitation.cpp b/src/validator-invitation.cpp
index dae4302..20d7116 100644
--- a/src/validator-invitation.cpp
+++ b/src/validator-invitation.cpp
@@ -13,7 +13,7 @@
 
 #include "logging.h"
 
-namespace chronos {
+namespace chronochat {
 
 using std::vector;
 
@@ -156,4 +156,4 @@
   return onValidated();
 }
 
-} // namespace chronos
+} // namespace chronochat