chore: fix spelling (#1657)

Author: nibalizer

docs/ce/howto/backendless-mode.mdx

@@ -7,7 +7,7 @@ Digger works best as a 2-piece solution:
 - a CLI that runs inside your CI
 - an orchestrator backend that triggers the CI jobs ([GitHub App](https://dashboard.digger.dev) or [self-hosted](/self-host/deploy-docker))
 
-You can however stil use the most basic features of Digger as a standalone action without a backend. To do that, set the following option in your workflow configuration:
+You can however still use the most basic features of Digger as a standalone action without a backend. To do that, set the following option in your workflow configuration:
 
 ```
 no-backend: true