Fix misspelling in documentation (#1914)

Author: mscherer

docs/content/documentation/getting-started/installation.md

@@ -99,7 +99,7 @@ To use zola:
 $ flatpak run org.getzola.zola [command]
 ```
 
-To avoid having to type this everytime, an alaias can be created in `~/.bashrc`:
+To avoid having to type this everytime, an alias can be created in `~/.bashrc`:
 
 ```sh
 $ alias zola="flatpak run org.getzola.zola"