chore: bump cargo-mono to 0.6.5 (#349)

## Summary
- bump the cargo-mono patch version from 0.6.4 to 0.6.5
- update the root Cargo.lock entry for cargo-mono

## Testing
- cargo test -p cargo-mono

Author: kdy1

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "cargo-mono"
-version = "0.6.4"
+version = "0.6.5"
 edition = "2021"
 license = "MIT"
 description = "Cargo subcommand for Rust monorepo management"