typo

README.md

     ```shell
     step certificate sign --profile intermediate-ca certs/ad.csr certs/root_ca.crt secrets/root_ca_key
     ```
-  Note: `step` might complaint if there's an emtpy trailing line at the end of the CSR
+  Note: `step` might complain if there's an emtpy trailing line at the end of the CSR
 - Copy the generated certificate on stdout AND `certs/root_ca.crt` somewhere to the AD-CS server
 - Run on the AD-CS server
     ```shell