Update docs/configuring-playbook-bot-mjolnir: adjust the section hierarchy

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

docs/configuring-playbook-bot-mjolnir.md

@@ -103,6 +103,18 @@ You must replace `ACCESS_TOKEN_FROM_STEP_2_GOES_HERE` with your own value.
 matrix_bot_mjolnir_access_token: "ACCESS_TOKEN_FROM_STEP_2_GOES_HERE"
 ```
 
+### Adding Mjolnir synapse antispam module (optional)
+
+To enable Mjolnir synapse antispam module, add the following configuration to your `inventory/host_vars/matrix.example.com/vars.yml` file (adapt to your needs):
+
+```yaml
+matrix_synapse_ext_spam_checker_mjolnir_antispam_enabled: true
+matrix_synapse_ext_spam_checker_mjolnir_antispam_config_block_invites: true
+matrix_synapse_ext_spam_checker_mjolnir_antispam_config_block_messages: false
+matrix_synapse_ext_spam_checker_mjolnir_antispam_config_block_usernames: false
+matrix_synapse_ext_spam_checker_mjolnir_antispam_config_ban_lists: []
+```
+
 ### Extending the configuration
 
 You can configure additional options by adding the `matrix_bot_mjolnir_configuration_extension_yaml` variable to your `inventory/host_vars/matrix.example.com/vars.yml` file.
@@ -121,18 +133,6 @@ matrix_bot_mjolnir_configuration_extension_yaml: |
   recordIgnoredInvites: true
 ```
 
-## Adding Mjolnir synapse antispam module (optional)
-
-Add the following configuration to your `inventory/host_vars/matrix.example.com/vars.yml` file (adapt to your needs):
-
-```yaml
-matrix_synapse_ext_spam_checker_mjolnir_antispam_enabled: true
-matrix_synapse_ext_spam_checker_mjolnir_antispam_config_block_invites: true
-matrix_synapse_ext_spam_checker_mjolnir_antispam_config_block_messages: false
-matrix_synapse_ext_spam_checker_mjolnir_antispam_config_block_usernames: false
-matrix_synapse_ext_spam_checker_mjolnir_antispam_config_ban_lists: []
-```
-
 ## Installing
 
 After configuring the playbook, run it with [playbook tags](playbook-tags.md) as below: