chore: pass max time to download canary (#281)

This should help by highlighting slow downloads as failures in the
github UI.

Signed-off-by: Will Murphy <will.murphy@anchore.com>

.github/scripts/download-listing-and-db.sh

@@ -7,10 +7,10 @@ test_download() {
  url=$1
 
  # download with IPv6
- curl -vsL6 -w "@$timing_file" $url -o /dev/null
+ curl -vsL6 -w "@$timing_file" --max-time 30 $url -o /dev/null
 
  # download with IPv4
- curl -vsL4 -w "@$timing_file" $url -o /dev/null
+ curl -vsL4 -w "@$timing_file" --max-time 120 $url -o /dev/null
 }
 
 test_download https://toolbox-data.anchore.io/grype/databases/listing.json