Spelling fixes

Change-Id: I3a85e921f87401701f3ebb22e972e0d3f9cf19c1
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/test/watchdog_test.cpp b/test/watchdog_test.cpp
index d3e09e6..57f32e9 100644
--- a/test/watchdog_test.cpp
+++ b/test/watchdog_test.cpp
@@ -102,7 +102,7 @@
     EXPECT_EQ(false, expired);
 }
 
-/** @brief Make sure the Inteval can be updated directly.
+/** @brief Make sure the Interval can be updated directly.
  */
 TEST_F(WdogTest, verifyIntervalUpdateReceived)
 {