Update dev.ts

Author: Haz Æ 41

cli/dev.ts

@@ -9,7 +9,7 @@ Usage:
 if the <dir> is empty, the current directory will be used.
 
 Options:
-    -h, --host       A hos to start the Aleph.js app, default is localhost
+    -h, --host       A host to start the Aleph.js app, default is localhost
     -p, --port       A port number to start the Aleph.js app, default is 8080
     -L, --log-level  Set log level [possible values: debug, info]
     -r, --reload     Reload source code cache