internal/vulndbreqs: increase parallelization by 2x

Parallelization helps and now we are able to process a day worths of
log. But we are still lagging behind in the past. Speed things up.

Change-Id: I49df9353954a35801727f0d9f1407827f8eb25ea
Reviewed-on: https://go-review.googlesource.com/c/pkgsite-metrics/+/606915
Auto-Submit: Zvonimir Pavlinovic <zpavlinovic@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>

internal/vulndbreqs/compute.go

diff --git a/internal/vulndbreqs/compute.go b/internal/vulndbreqs/compute.go
index b757476..9bca480 100644
--- a/internal/vulndbreqs/compute.go
+++ b/internal/vulndbreqs/compute.go
@@ -249,7 +249,7 @@
 	}
 
 	g, ctx := errgroup.WithContext(ctx)
-	g.SetLimit(5)
+	g.SetLimit(10)
 	for _, name := range objNames {
 		name := name
 		g.Go(func() error {