Spelling fixes

Change-Id: Ia840360c00cc8d7baaafd797ae2411bc5cc03ed3
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/main.cpp b/main.cpp
index 1798dc0..b75c133 100644
--- a/main.cpp
+++ b/main.cpp
@@ -15,7 +15,7 @@
     };
     using SdEvent = std::unique_ptr<sd_event, decltype(eventDeleter)>;
 
-    // acquire a referece to the default event loop
+    // acquire a reference to the default event loop
     sd_event_default(&event);
     SdEvent sdEvent {event, eventDeleter};
     event = nullptr;