Update the issue template with stricter wording
Update the issue template with stricter wording

Many people either ignore the template or fail to send us the URIs we
need for repro.  This adds language making it clear what we need.

Change-Id: I4da8d0dd7d7a203e71e5cc6c55b99e2f27e8d642

shaka-project/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,TheModMaker/shaka-player,tvoli/shaka-player,vimond/shaka-player,vimond/shaka-player,TheModMaker/shaka-player,shaka-project/shaka-player,TheModMaker/shaka-player,TheModMaker/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,vimond/shaka-player