chore: fix some comments (#538)

Signed-off-by: murongshaozong <[email protected]>
Co-authored-by: Greg Nazario <[email protected]>

apps/nextra/pages/en/build/smart-contracts/deployment.mdx

@@ -42,7 +42,7 @@ aptos move compile --named-addresses <your_module_name>=<your_address>
 
 ### Deploy code to an object
 
-Deploy the compiled code to an an object via the command:
+Deploy the compiled code to an object via the command:
 - Replace `<your_module_name>` with the module name.
 
 ```bash filename="Terminal"