Fix spelling mistakes

These were found with:
codespell -w $(git ls-files | grep "\.[hc]\(pp\)\?$")

At some point in the future, we might want to get this enabled in CI.

Change-Id: Iccb57b2adfd06a2e177e99db2923fe4e8e329118
Signed-off-by: Ed Tanous <ed@tanous.net>
diff --git a/redfish-core/lib/event_service.hpp b/redfish-core/lib/event_service.hpp
index ee8fc5d..8bc8f9b 100644
--- a/redfish-core/lib/event_service.hpp
+++ b/redfish-core/lib/event_service.hpp
@@ -452,7 +452,7 @@
 
         if (context)
         {
-            // This value is selected aribitrarily.
+            // This value is selected arbitrarily.
             constexpr const size_t maxContextSize = 256;
             if (context->size() > maxContextSize)
             {