Fix typos in readme

Author: Coriolan-dev

README.md

@@ -4,13 +4,13 @@ A wrapper around [`anchor test`] for computing test coverage
 
 ## Steps to use
 
-1. Install the Agave validator [from source] after adding the following to the `[patch.crate-io]` section near the end of its Cargo.toml:
+1. Install the Agave validator [from source] after adding the following to the `[patch.crates-io]` section near the end of its Cargo.toml:
 
  ```toml
  solana-sbpf = { git = "https://github.com/trail-of-forks/sbpf-coverage" }
  ```
 
- For many situations, the following commands should suffice:
+ For Linux users, the following commands should suffice:
 
  ```sh
  sed -i '/^\[patch\.crates-io\]$/a solana-sbpf = { git = "https://github.com/trail-of-forks/sbpf-coverage" }' Cargo.toml