Fix a grammar issue in part11c.md

Author: rikurauhala

src/content/11/en/part11c.md

@@ -282,7 +282,7 @@ Now when you know that the script based health check works, it is time to define
 
 You propably should use [curl](https://curl.se/) in the script to do the HTTP request. You most likely need to Google how to get hold to the returned string and compare it with the expected value 'ok'.
 
-It is <strong>strongly advisable</strong> to check first locally that the script works since so many things can go wrong in it, and when run in GitHub Action, you can not do any debug printing. If and <i> when</i> things do not work as indended, it is also a very good idea to log in to the virtual machine (with <i>flyctl ssh console</i>) and check that the script works when runned manually there.
+It is <strong>strongly advisable</strong> to check first locally that the script works since so many things can go wrong in it, and when run in GitHub Action, you can not do any debug printing. If and <i> when</i> things do not work as indended, it is also a very good idea to log in to the virtual machine (with <i>flyctl ssh console</i>) and check that the script works when ran manually there.
 
 *Note* that in order to test the script in the virtual machine, you should have the script in your local directory when you make a successful deployment. So if your deployment fails, the script will not be uploaded to the Fly.io server. So in case of problems, comment out the script based health check from fly.toml and do a deployment to get your script to the virtual machine.