Update README

Author: gingerhot

README.md

@@ -1,6 +1,6 @@
 # SSH keygen Action
 
-The action runs `ssh-kengen` to generate a key pair stored in `private_key.txt` and `public_key.txt`, with `rsa` encryption and 4096 bits by default. You can specify your inputs.
+The action runs `ssh-keygen` to generate a key pair stored in `private_key.txt` and `public_key.txt`, with `rsa` encryption and 4096 bits by default. You can specify your inputs.
 
 Or just use [the template](https://github.com/gitx-io/ssh-keygen-template) to run a workflow_dispatch action to generate a specified one.