cmd/coordinator: fix misnamed span

This was copied from runSubrepoTests and never renamed.

Change-Id: I68db1dd148a94df9a72d2f79a3f5125a78251500
Reviewed-on: https://go-review.googlesource.com/c/build/+/413685
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
diff --git a/cmd/coordinator/buildstatus.go b/cmd/coordinator/buildstatus.go
index d7af7da..b2ec451 100644
--- a/cmd/coordinator/buildstatus.go
+++ b/cmd/coordinator/buildstatus.go
@@ -1320,7 +1320,7 @@
 	}
 
 	// Run golang.org/x/benchmarks/cmd/bench to perform benchmarks.
-	sp = st.CreateSpan("running_subrepo_tests", st.SubName)
+	sp = st.CreateSpan("running_benchmark_tests", st.SubName)
 	defer func() { sp.Done(err) }()
 
 	env := append(st.conf.Env(),