sysadm: Fix misindentation

toctree indentation needs to be consistent across indexes (3).

sysadm/deployment/index.rst

@@ -4,7 +4,7 @@ SWH Software Deployment
 .. toctree::
    :titlesonly:
 
-  software-deployment-overview
-  upgrade-swh-service
-  deploy-lister
-  data-migration
+   software-deployment-overview
+   upgrade-swh-service
+   deploy-lister
+   data-migration

sysadm/user-management/index.rst

@@ -4,7 +4,7 @@ User management
 .. toctree::
    :titlesonly:
 
-  onboarding
-  outboarding
-  how-to-manage-creds-store
-  keycloak/index
+   onboarding
+   outboarding
+   how-to-manage-creds-store
+   keycloak/index

sysadm/user-management/keycloak/index.rst

@@ -4,5 +4,5 @@ Keycloak
 .. toctree::
    :titlesonly:
 
-  how-to-user-perms
-  authentification
+   how-to-user-perms
+   authentification