Fix two missing words

README.md

@@ -54,9 +54,9 @@ openssl req -new -sha256 -key domain.key -subj "/" -reqexts SAN -config <(cat /e
 
 You must prove you own the domains you want a certificate for, so Let's Encrypt
 requires you host some files on them. This script will generate and write those
-files the folder you specify, so all you need to do is make sure that folder
-is served under the ".well-known/acme-challenge/" url path. NOTE: This must be
-on port 80 (not port 443).
+files in the folder you specify, so all you need to do is make sure that this
+folder is served under the ".well-known/acme-challenge/" url path. NOTE: This
+must be on port 80 (not port 443).
 
 ```
 #make some challenge folder (modify to suit your needs)