Update website/docs/cli/commands/terraform/terraform-shell.mdx

Co-authored-by: Erik Osterman (CEO @ Cloud Posse) <[email protected]>

website/docs/cli/commands/terraform/terraform-shell.mdx

@@ -41,7 +41,7 @@ The command does the following:
 
 - Sets the `ATMOS_SHLVL` environment variable to track shell nesting levels.
     - If `ATMOS_SHLVL` is not set, it initializes to 1.
-    - If ATMOS_SHLVL is already set, it increments the value by 1 for each new shell.
+    - If `ATMOS_SHLVL` is already set, it increments the value by 1 for each new shell.
 
 :::tip
 Run `atmos terraform shell --help` to see all the available options