clang-tidy: Add missing 'override' specifiers

Fixes for clang-tidy errors

'''
/include/error_monitors/err_pin_timeout_monitor.hpp:40:10: error:
   'logEvent' overrides a member function but is not marked 'override' [clang-diagnostic-inconsistent-missing-override]
/include/error_monitors/ierr_monitor.hpp:47:10: error:
   'logEvent' overrides a member function but is not marked 'override' [clang-diagnostic-inconsistent-missing-override]
'''

Change-Id: Ic0b34e258d3996251f8f236a3840c1cc7f4e570a
Signed-off-by: Jayanth Othayoth <ojayanth@gmail.com>
diff --git a/include/error_monitors/err_pin_timeout_monitor.hpp b/include/error_monitors/err_pin_timeout_monitor.hpp
index 14f2895..b341ce5 100644
--- a/include/error_monitors/err_pin_timeout_monitor.hpp
+++ b/include/error_monitors/err_pin_timeout_monitor.hpp
@@ -37,7 +37,7 @@
     const static constexpr size_t errPinPollingTimeMs = 1000;
     const static constexpr size_t errPinTimeoutMs = 90000;
 
-    void logEvent()
+    void logEvent() override
     {
         if (errPinCPUs.none())
         {
diff --git a/include/error_monitors/ierr_monitor.hpp b/include/error_monitors/ierr_monitor.hpp
index 2a2dc78..58b1c41 100644
--- a/include/error_monitors/ierr_monitor.hpp
+++ b/include/error_monitors/ierr_monitor.hpp
@@ -44,7 +44,7 @@
     static const constexpr char* callbackMgrPath =
         "/xyz/openbmc_project/CallbackManager";
 
-    void logEvent()
+    void logEvent() override
     {
         if (!checkIERRCPUs())
         {