Add missing [workspace] to cargo-0.60.0.

nnethercote · nnethercote · commit ca3e73740eda · 2022-03-18T07:43:39.000+11:00
This should have been part of #1209.
diff --git a/collector/benchmarks/cargo-0.60.0/Cargo.toml b/collector/benchmarks/cargo-0.60.0/Cargo.toml
@@ -232,3 +232,5 @@ features = [
     "wincon",
     "winnt",
 ]
+
+[workspace]
