Fix typos and wording in README.md

Corrected typos and improved clarity in README.

Author: zekraken-bot

src/tokenlists/README.md

@@ -5,17 +5,17 @@
 To create a new token list run:
 
 ```shell
-npm run tokenlists:create my-new-tokenlist
+npm run tokenlist:create my-new-tokenlist
 ```
 
-This will generate two files nest in a folder called
+This will generate two files nested in a folder called
 `tokenlists/my-new-tokenlist`:
 
 1. tokens.ts - Add token addresses here that you want to include in your
    tokenlist
 2. overwrites.ts - Add overwrite data here for specific token addresses.
 
-## Add new tokens it existing list
+## Add new tokens to an existing list
 
 To add new tokens to an existing tokenlist, add the token address to the
 `tokens.ts` file within the relevant network key.
@@ -27,7 +27,7 @@ To remove a token from an existing tokenlist, remove the token address from the
 
 ## Overwrite tokenlist output data
 
-To overwrite token metadata produced in the tokenslist, add the desired metadata
+To overwrite token metadata produced in the tokenlist, add the desired metadata
 to the overwrites file where the key is the token address and the value is the
 overwrite data you want to inject. For example, if you simply wanted to make
 sure the token name for WETH was 'Wrapped Ether' then you would add: