Update contracts build instructions

Author: webmaster128

README.md

@@ -319,13 +319,19 @@ cargo fmt \
 
 **Contracts**
 
-Step 1 (fast checks)
+Step 1 (fast checks, rebuilds lock files)
+
+```sh
+for contract_dir in contracts/*/; do (cd "$contract_dir" && cargo check --tests) || break; done
+```
+
+Step 2 (medium fast checks)
 
 ```sh
 for contract_dir in contracts/*/; do (cd "$contract_dir" && cargo fmt && cargo check --tests && cargo wasm-debug && cargo unit-test && cargo clippy -- -D warnings && cargo schema) || break; done
 ```
 
-Step 2 (slower checks)
+Step 3 (slower checks)
 
 ```sh
 for contract_dir in contracts/*/; do (cd "$contract_dir" && cargo wasm && cargo integration-test) || break; done