Fix astartectl command to create a realm
Fix Astarte in 5 minutes guide where the astartectl command to create a
realm used a not existent flag.
MODIFY
doc/pages/tutorials/010-astarte_in_5_minutes.md
doc/pages/tutorials/010-astarte_in_5_minutes.md
@@ -96,7 +96,7 @@ Also, we will need a JWT token to authenticate against Housekeeping. `generate-c
Use `astartectl` to create a new Realm:
```sh
-$ astartectl housekeeping realms create test --housekeeping-url http://localhost:4001/ -p test_public.pem -k compose/astarte-keys/housekeeping_private.pem
+$ astartectl housekeeping realms create test --housekeeping-url http://localhost:4001/ --realm-public-key test_public.pem -k compose/astarte-keys/housekeeping_private.pem
```
This creates a `test` realm, which should be ready to be used almost immediately. To ensure your realm is available and ready, check if it exists in Astarte by issuing:

Fix astartectl command to create a realm

Fix Astarte in 5 minutes guide where the astartectl command to create a
realm used a not existent flag.

Signed-off-by: Davide Briani <davide.briani@ispirata.com>