Update inputs.md
Update inputs.md

Corrected cases on names and slight edits. Added links from deprecated to newer plugins.
influxdb/docs.influxdata.com,influxdb/docs.influxdata.com,influxdb/docs.influxdata.com,influxdata/docs.influxdata.com,influxdata/docs.influxdata.com,influxdata/docs.influxdata.com,influxdata/docs.influxdata.com,influxdata/docs.influxdata.com