Remove "please" from documentation

doc/administration/configure.md

doc/administration/geo/disaster_recovery/planned_failover.md

doc/administration/gitaly/index.md

doc/administration/gitaly/troubleshooting.md

...istration/monitoring/performance/grafana_configuration.md

doc/administration/nfs.md

doc/administration/package_information/defaults.md

doc/administration/package_information/signed_packages.md

doc/administration/postgresql/replication_and_failover.md

doc/administration/redis/replication_and_failover.md

...administration/redis/replication_and_failover_external.md

doc/administration/system_hooks.md

doc/administration/troubleshooting/test_environments.md

doc/api/deployments.md

doc/api/feature_flag_specs.md

doc/api/groups.md