Updated CONTRIBUTING.md
Updated CONTRIBUTING.md

  * Don't add red herrings to tickets
  * Provide all information when actually experiencing the same
     symptoms as an existing ticket

Javierma/OctoPrint-TFG,CapnBry/OctoPrint,nickverschoor/OctoPrint,nickverschoor/OctoPrint,bicephale/OctoPrint,bicephale/OctoPrint,foosel/OctoPrint,Jaesin/OctoPrint,CapnBry/OctoPrint,ryanneufeld/OctoPrint,Jaesin/OctoPrint,senttech/OctoPrint,beeverycreative/BEEweb,JackGavin13/octoprint-test-not-finished,Salandora/OctoPrint,bicephale/OctoPrint,senttech/OctoPrint,beeverycreative/BEEweb,foosel/OctoPrint,ryanneufeld/OctoPrint,ryanneufeld/OctoPrint,bicephale/OctoPrint,JackGavin13/octoprint-test-not-finished,Javierma/OctoPrint-TFG,MoonshineSG/OctoPrint,Salandora/OctoPrint,foosel/OctoPrint,MoonshineSG/OctoPrint,nickverschoor/OctoPrint,JackGavin13/octoprint-test-not-finished,shohei/Octoprint,Jaesin/OctoPrint,MoonshineSG/OctoPrint,leductan-nguyen/RaionPi,beeverycreative/BEEweb,Javierma/OctoPrint-TFG,shohei/Octoprint,nickverschoor/OctoPrint,ryanneufeld/OctoPrint,CapnBry/OctoPrint,leductan-nguyen/RaionPi,Salandora/OctoPrint,leductan-nguyen/RaionPi,senttech/OctoPrint,leductan-nguyen/RaionPi,shohei/Octoprint,JackGavin13/octoprint-test-not-finished,foosel/OctoPrint,shohei/Octoprint,Javierma/OctoPrint-TFG,beeverycreative/BEEweb,Salandora/OctoPrint,shohei/Octoprint,Jaesin/OctoPrint,CapnBry/OctoPrint,senttech/OctoPrint,MoonshineSG/OctoPrint