[HOTFIX] Modify pull request template
[HOTFIX] Modify pull request template

zzcclp/carbondata,jackylk/incubator-carbondata,jackylk/incubator-carbondata,jackylk/incubator-carbondata,zzcclp/carbondata,jackylk/incubator-carbondata,zzcclp/carbondata,zzcclp/carbondata,zzcclp/carbondata