fixup tutorials for cargo-component-component 0.10.1

Author: b5

_posts/2024-02-19-jco-1.0.md

@@ -77,6 +77,7 @@ $ cd playground-jco                        # Enter the newly created project
 $ npm init -y                              # Setup a Node.js environment
 $ touch index.js                           # Create a JS entrypoint
 $ echo node_modules >> .gitignore          # Add node_modules to our .gitignore file
+$ cargo add wit_bindgen                    # add cargo crate dependencies
 ```
 
 This should leave you with a structure that roughly looks like this:
@@ -102,7 +103,7 @@ which takes a regular string, and converts it to [SHOUTING
 CASE!!1!](https://github.com/badboy/stdshout).
 
 ```wit
-package my-org:wit-playground
+package my-org:wit-playground;
 
 world playground {
   export scream: func(input: string) -> string;