website: Remove </span> tags from arm summet '17 page

Change-Id: Ia663a826efa500ca516ec968b7d8289f3e171310
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-website/+/60011
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: Bobby Bruce <bbruce@ucdavis.edu>
1 file changed