Spelling errors in /docs/

docs/user-guide/secrets/index.md

@@ -666,7 +666,7 @@ one called, say, `prod-user` with the `prod-db-secret`, and one called, say,
 
 ### Use-case: Dotfiles in secret volume
 
-In order to make piece of data 'hidden' (ie, in a file whose name begins with a dot character), simply
+In order to make piece of data 'hidden' (i.e., in a file whose name begins with a dot character), simply
 make that key begin with a dot.  For example, when the following secret is mounted into a volume:
 
 ```json