ci: code owner approval for Cargo.lock, not toml (#10483)

Signed-off-by: Dori Medini <[email protected]>

Author: dorimedini-starkware

.github/CODEOWNERS

@@ -3,4 +3,4 @@
 # For more information, see: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
 
 # Require approval from the sequencer-cargo-owners team for workspace dependency changes
-Cargo.toml @starkware-libs/sequencer-cargo-owners
+Cargo.lock @starkware-libs/sequencer-cargo-owners