Updates to admin documentation

docs/admin_docs/source/client.rst

docs/admin_docs/source/client_release.rst

docs/admin_docs/source/conf.py

docs/admin_docs/source/dev.rst

docs/admin_docs/source/index.rst

docs/admin_docs/source/introduction.rst

docs/admin_docs/source/lvalert_management.rst

docs/admin_docs/source/miscellaneous.rst

docs/admin_docs/source/new_gracedb_instance.rst

docs/admin_docs/source/new_pipeline.rst

docs/admin_docs/source/new_server_feature.rst

docs/admin_docs/source/ops.rst

docs/admin_docs/source/phone_alerts.rst

docs/admin_docs/source/public_gracedb.rst

docs/admin_docs/source/robot_certificate.rst

docs/admin_docs/source/server_maintenance.rst

docs/admin_docs/source/sql_tips.rst

docs/admin_docs/source/user_permissions.rst