src: correct typo in trace_event header

PR-URL: #15583
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

src/tracing/trace_event.h

@@ -30,7 +30,7 @@ enum CategoryGroupEnabledFlags {
   kEnabledForETWExport_CategoryGroupEnabledFlags = 1 << 3,
 };
 
-// By default, const char* asrgument values are assumed to have long-lived scope
+// By default, const char* argument values are assumed to have long-lived scope
 // and will not be copied. Use this macro to force a const char* to be copied.
 #define TRACE_STR_COPY(str) node::tracing::TraceStringWithCopy(str)