update cpp mutex change

Cynthia Jiang · Cynthia Jiang · commit ea21ff7d8fec · 2022-01-04T10:58:12.000-08:00
diff --git a/app/src/cpp_instance_manager.h b/app/src/cpp_instance_manager.h
@@ -24,7 +24,7 @@
 
 #include "app/src/assert.h"
 #include "app/src/log.h"
-#include "app/src/mutex.h"
+#include "app/src/include/firebase/internal/mutex.h"
 
 namespace firebase {
 
