use fallback Cargo instead of old broken Cargos
use fallback Cargo instead of old broken Cargos

Mark-Simulacrum/rustc-perf-collector,Mark-Simulacrum/rustc-perf-collector,Mark-Simulacrum/rustc-perf-collector,Mark-Simulacrum/rustc-perf-collector,nrc/rustc-perf,Mark-Simulacrum/rustc-perf-collector,nrc/rustc-perf,nrc/rustc-perf,Mark-Simulacrum/rustc-perf-collector