config: Fix description of checkpoint option from cycle to tick
config: Fix description of checkpoint option from cycle to tick

This patch merely updates the description of the "take-checkpoints"
option to reflect that it is specified in ticks and not in cycles.

joerocklin/gem5,Weil0ng/gem5,rallylee/gem5,TUD-OS/gem5-dtu,cancro7/gem5,gem5/gem5,samueldotj/TeeRISC-Simulator,zlfben/gem5,yb-kim/gemV,gem5/gem5,austinharris/gem5-riscv,Weil0ng/gem5,samueldotj/TeeRISC-Simulator,yb-kim/gemV,KuroeKurose/gem5,zlfben/gem5,rallylee/gem5,sobercoder/gem5,Weil0ng/gem5,gedare/gem5,joerocklin/gem5,rjschof/gem5,kaiyuanl/gem5,yb-kim/gemV,markoshorro/gem5,TUD-OS/gem5-dtu,powerjg/gem5-ci-test,powerjg/gem5-ci-test,briancoutinho0905/2dsampling,powerjg/gem5-ci-test,samueldotj/TeeRISC-Simulator,KuroeKurose/gem5,cancro7/gem5,kaiyuanl/gem5,aclifton/cpeg853-gem5,sobercoder/gem5,aclifton/cpeg853-gem5,austinharris/gem5-riscv,rallylee/gem5,gedare/gem5,markoshorro/gem5,sobercoder/gem5,aclifton/cpeg853-gem5,gedare/gem5,TUD-OS/gem5-dtu,rallylee/gem5,zlfben/gem5,HwisooSo/gemV-update,briancoutinho0905/2dsampling,HwisooSo/gemV-update,briancoutinho0905/2dsampling,powerjg/gem5-ci-test,markoshorro/gem5,joerocklin/gem5,sobercoder/gem5,yb-kim/gemV,rjschof/gem5,SanchayanMaity/gem5,qizenguf/MLC-STT,rjschof/gem5,kaiyuanl/gem5,KuroeKurose/gem5,qizenguf/MLC-STT,rallylee/gem5,KuroeKurose/gem5,gem5/gem5,SanchayanMaity/gem5,HwisooSo/gemV-update,yb-kim/gemV,TUD-OS/gem5-dtu,gedare/gem5,zlfben/gem5,aclifton/cpeg853-gem5,rallylee/gem5,zlfben/gem5,aclifton/cpeg853-gem5,Weil0ng/gem5,TUD-OS/gem5-dtu,KuroeKurose/gem5,gem5/gem5,gedare/gem5,qizenguf/MLC-STT,HwisooSo/gemV-update,briancoutinho0905/2dsampling,rjschof/gem5,HwisooSo/gemV-update,Weil0ng/gem5,kaiyuanl/gem5,aclifton/cpeg853-gem5,yb-kim/gemV,TUD-OS/gem5-dtu,gem5/gem5,joerocklin/gem5,cancro7/gem5,gedare/gem5,KuroeKurose/gem5,briancoutinho0905/2dsampling,rjschof/gem5,zlfben/gem5,powerjg/gem5-ci-test,rallylee/gem5,gedare/gem5,qizenguf/MLC-STT,briancoutinho0905/2dsampling,sobercoder/gem5,austinharris/gem5-riscv,yb-kim/gemV,sobercoder/gem5,KuroeKurose/gem5,rjschof/gem5,gem5/gem5,austinharris/gem5-riscv,cancro7/gem5,samueldotj/TeeRISC-Simulator,austinharris/gem5-riscv,powerjg/gem5-ci-test,kaiyuanl/gem5,samueldotj/TeeRISC-Simulator,gem5/gem5,joerocklin/gem5,joerocklin/gem5,Weil0ng/gem5,zlfben/gem5,SanchayanMaity/gem5,sobercoder/gem5,markoshorro/gem5,samueldotj/TeeRISC-Simulator,qizenguf/MLC-STT,markoshorro/gem5,joerocklin/gem5,SanchayanMaity/gem5,TUD-OS/gem5-dtu,SanchayanMaity/gem5,markoshorro/gem5,joerocklin/gem5,rjschof/gem5,cancro7/gem5,Weil0ng/gem5,samueldotj/TeeRISC-Simulator,cancro7/gem5,HwisooSo/gemV-update,austinharris/gem5-riscv,qizenguf/MLC-STT,briancoutinho0905/2dsampling,kaiyuanl/gem5,austinharris/gem5-riscv,HwisooSo/gemV-update,markoshorro/gem5,aclifton/cpeg853-gem5,SanchayanMaity/gem5,kaiyuanl/gem5,cancro7/gem5,SanchayanMaity/gem5,yb-kim/gemV,powerjg/gem5-ci-test,qizenguf/MLC-STT