cargo lock updater: use git ls-files

.pre-commit-hooks.yaml

@@ -4,9 +4,11 @@
   entry: cargo-lock-updater
   language: script
   types: [text]
+  require_serial: true
 - id: fmt-check
   name: Check formatting
   description: Runs make fmt-check
   entry: fmt-check
   language: script
   types: [text]
+  require_serial: true

cargo-lock-updater

@@ -1,6 +1,5 @@
 #!/usr/bin/env zsh
-
-find . -type f -name 'Cargo.lock' -print0 | while IFS=$'\0' read -r -d '' file; do
+for file in $(git ls-files | grep Cargo.lock); do
 	(cd "$(dirname "$file")" && cargo update -wq)
 	git add $file
 done