Improve close-stale-pr messages (and add mentions)
Improve close-stale-pr messages (and add mentions)

Improve the message so they are grammatically better and more
self-contained (especially for people reading by email).

Also try to mention relevant users so that they can notice that the
pull-request will be closed.

olark/kubernetes-contrib,ingvagabund/contrib,caesarxuchao/contrib,thockin/contrib,jcmoraisjr/k8s-contrib,grodrigues3/contrib,jasonbrooks/contrib,widgetpl/contrib,girishkalele/contrib,eastbanctech/kubernetes-contrib,Pensu/contrib,aledbf/contrib,micheleorsi/contrib,krzyzacy/contrib,eparis/contrib,luxas/contrib,piosz/contrib,ixdy/kubernetes-contrib,vishpat/contrib,luxas/contrib,pwittrock/contrib,devlinmr/contrib,verb/contrib,jcmoraisjr/k8s-contrib,caesarxuchao/contrib,pwittrock/contrib,xialonglee/contrib,ixdy/contrib,aledbf/contrib,krzyzacy/contrib,ingvagabund/contrib,k8s-packages-power/contrib,kow3ns/contrib,pwittrock/contrib,verb/contrib,spxtr/contrib,jasonbrooks/contrib,xialonglee/contrib,kow3ns/contrib,krzyzacy/contrib,ixdy/kubernetes-contrib,devlinmr/contrib,jasonbrooks/contrib,verb/contrib,rmmh/kubernetes-contrib,micheleorsi/contrib,jasonbrooks/contrib,olark/kubernetes-contrib,rchicoli/kubernetes-contrib,vishpat/contrib,jasonbrooks/contrib,xialonglee/contrib,hongchaodeng/contrib,marketlogicsoftware/contrib,micheleorsi/contrib,cdemers/contrib,olark/kubernetes-contrib,luxas/contrib,thockin/contrib,mikedanese/contrib,piosz/contrib,kskalski/contrib,upmc-enterprises/contrib,Q-Lee/contrib,mikedanese/contrib,rmmh/kubernetes-contrib,rmmh/kubernetes-contrib,foxish/contrib,pwittrock/contrib,girishkalele/contrib,hongchaodeng/contrib,caesarxuchao/contrib,upmc-enterprises/contrib,eparis/contrib,foxish/contrib,eastbanctech/kubernetes-contrib,spxtr/contrib,lewislyou/contrib,mikedanese/contrib,Pensu/contrib,verb/contrib,vishpat/contrib,Pensu/contrib,marketlogicsoftware/contrib,krzyzacy/contrib,luxas/contrib,eastbanctech/kubernetes-contrib,olark/kubernetes-contrib,kskalski/contrib,devlinmr/contrib,ixdy/kubernetes-contrib,piosz/contrib,verb/contrib,micheleorsi/contrib,cdemers/contrib,kow3ns/contrib,mikedanese/contrib,kskalski/contrib,k8s-packages-power/contrib,rchicoli/kubernetes-contrib,lewislyou/contrib,grodrigues3/contrib,Q-Lee/contrib,jcmoraisjr/k8s-contrib,caesarxuchao/contrib,pwittrock/contrib,rmmh/kubernetes-contrib,upmc-enterprises/contrib,kskalski/contrib,eastbanctech/kubernetes-contrib,danushkaf/contrib,moul/contrib,xialonglee/contrib,hongchaodeng/contrib,ixdy/kubernetes-contrib,piosz/contrib,kskalski/contrib,k8s-packages-power/contrib,ingvagabund/contrib,eparis/contrib,ingvagabund/contrib,lewislyou/contrib,cdemers/contrib,Pensu/contrib,widgetpl/contrib,marketlogicsoftware/contrib,rchicoli/kubernetes-contrib,marketlogicsoftware/contrib,moul/contrib,caesarxuchao/contrib,ixdy/kubernetes-contrib,vishpat/contrib,upmc-enterprises/contrib,Wattpad/kubernetes-contrib,grodrigues3/contrib,Q-Lee/contrib,ingvagabund/contrib,Wattpad/kubernetes-contrib,x13n/contrib,moul/contrib,devlinmr/contrib,Pensu/contrib,thockin/contrib,olark/kubernetes-contrib,ixdy/contrib,hongchaodeng/contrib,devlinmr/contrib,k8s-packages-power/contrib,cdemers/contrib,verb/contrib,piosz/contrib,piosz/contrib,krzyzacy/contrib,Wattpad/kubernetes-contrib,micheleorsi/contrib,pwittrock/contrib,eparis/contrib,olark/kubernetes-contrib,mikedanese/contrib,girishkalele/contrib,thockin/contrib,luxas/contrib,krzyzacy/contrib,grodrigues3/contrib,jcmoraisjr/k8s-contrib,k8s-packages-power/contrib,cdemers/contrib,foxish/contrib,widgetpl/contrib,jasonbrooks/contrib,eparis/contrib,rmmh/kubernetes-contrib,moul/contrib,girishkalele/contrib,spxtr/contrib,widgetpl/contrib,spxtr/contrib,x13n/contrib,spxtr/contrib,danushkaf/contrib,Q-Lee/contrib,caesarxuchao/contrib,upmc-enterprises/contrib,x13n/contrib,grodrigues3/contrib,danushkaf/contrib,eastbanctech/kubernetes-contrib,Wattpad/kubernetes-contrib,hongchaodeng/contrib,marketlogicsoftware/contrib,x13n/contrib,upmc-enterprises/contrib,devlinmr/contrib,thockin/contrib,girishkalele/contrib,k8s-packages-power/contrib,hongchaodeng/contrib,vishpat/contrib,rchicoli/kubernetes-contrib,danushkaf/contrib,cdemers/contrib,thockin/contrib,lewislyou/contrib,jcmoraisjr/k8s-contrib,foxish/contrib,vishpat/contrib,kow3ns/contrib,eparis/contrib,rchicoli/kubernetes-contrib,aledbf/contrib,foxish/contrib,jcmoraisjr/k8s-contrib,moul/contrib,marketlogicsoftware/contrib,danushkaf/contrib,Wattpad/kubernetes-contrib,eastbanctech/kubernetes-contrib,rchicoli/kubernetes-contrib,ixdy/kubernetes-contrib,x13n/contrib,rmmh/kubernetes-contrib,xialonglee/contrib,aledbf/contrib,Q-Lee/contrib,Pensu/contrib,Q-Lee/contrib,kow3ns/contrib,danushkaf/contrib,kow3ns/contrib,widgetpl/contrib,widgetpl/contrib,micheleorsi/contrib,spxtr/contrib,xialonglee/contrib,x13n/contrib,Wattpad/kubernetes-contrib,girishkalele/contrib,lewislyou/contrib,kskalski/contrib,ixdy/contrib,mikedanese/contrib,luxas/contrib,aledbf/contrib,aledbf/contrib,ingvagabund/contrib,lewislyou/contrib,foxish/contrib,grodrigues3/contrib