thresholds: Fix typo in interface name

Signed-off-by: Rashmica Gupta <rashmica.g@gmail.com>
Change-Id: I784296f04a0a89cb38ced5769e29b0f177153c09
diff --git a/src/Thresholds.cpp b/src/Thresholds.cpp
index ebb9dd0..b82a511 100644
--- a/src/Thresholds.cpp
+++ b/src/Thresholds.cpp
@@ -563,7 +563,7 @@
             level = "Critical";
             break;
         case Level::SOFTSHUTDOWN:
-            level = "SoftShutDown";
+            level = "SoftShutdown";
             break;
         case Level::HARDSHUTDOWN:
             level = "HardShutdown";