Fix goroutine lead in install action

a case in RunWithContex()
RunWithContex() {
go i.performInstall // running for a longer time
go i handleContex // return from ctx.Done() and send message to rchan, but performInstall is always running
result := < -rChan //read message
}

the message in rchan will be received in RunWithContex(), and RunWithContex() returns soon.
so, this case lead to goroutine performInstall leak

Signed-off-by: Jiahao Huang <july2993@gmail.com>

pkg/action/install.go

@@ -344,7 +344,7 @@ func (i *Install) RunWithContext(ctx context.Context, chrt *chart.Chart, vals ma
 		// not working.
 		return rel, err
 	}
-	rChan := make(chan resultMessage)
+	rChan := make(chan resultMessage, 2)
 	doneChan := make(chan struct{})
 	defer close(doneChan)
 	go i.performInstall(rChan, rel, toBeAdopted, resources)