Add missing argument to fmt.Errorf function in 'ntp' collector
Add missing argument to fmt.Errorf function in 'ntp' collector

Signed-off-by: Pavel Borzenkov <073b1820d4178210f16262dddeb2ba44fb7467d3@gmail.com>

joehandzik/node_exporter,bs-github/node_exporter,ema/node_exporter,trayio/node_exporter,bs-github/node_exporter,Jean-Daniel/node_exporter,siavashs/node_exporter,knweiss/node_exporter,prometheus/node_exporter,cbstewart9393/node_exporter,Jean-Daniel/node_exporter,Jean-Daniel/node_exporter,joehandzik/node_exporter,ema/node_exporter,knweiss/node_exporter,knweiss/node_exporter,chosenken/node_exporter,chosenken/node_exporter,mslocrian/flexswitch_exporter,knweiss/node_exporter,siavashs/node_exporter,chosenken/node_exporter,trayio/node_exporter,cbstewart9393/node_exporter,aletessier/node_exporter,joehandzik/node_exporter,derekmarcotte/node_exporter,siavashs/node_exporter,prometheus/node_exporter,aletessier/node_exporter,ema/node_exporter,derekmarcotte/node_exporter,prometheus/node_exporter,bs-github/node_exporter,derekmarcotte/node_exporter,derekmarcotte/node_exporter,mslocrian/flexswitch_exporter,Jean-Daniel/node_exporter,ema/node_exporter,bs-github/node_exporter,joehandzik/node_exporter,chosenken/node_exporter,siavashs/node_exporter