Fix Readme typos

README.md

@@ -4,7 +4,7 @@ certcheckntfy is my rudimentary Rust-way of getting informed by a push message w
 
 I could simply run `certbot renew` with additional hooks but I have to update the TLSA record at my DNS provider manually as they are not providing any API. That's why I decided against it and went for the _notification way_ only.
 
-## Prerequisits
+## Prerequisites
 
 - The Rust compiler installed on your system to build the software
 - A working NTFY server, see [NTFY Homepage](https://ntfy.sh)
@@ -15,7 +15,7 @@ I could simply run `certbot renew` with additional hooks but I have to update th
 
 ## Install
 
-- checkout and build with `cargo build --release`
+- Checkout and build with `cargo build --release`
 - Copy the executable from `target/release/certcheckntfy` to your server(s)
 - Copy the .service und the .timer file to `/etc/systemd/system` (on your server(s) of course)
 - Adjust the .service and .timer file to your liking