Update rs-prometheus-metrics-v2.md (#1887)

* Update rs-prometheus-metrics-v2.md

Remove redundant metrics

* Marked redis_server_db0_avg_ttl and redis_server_db0_keys metrics as deprecated

---------

Co-authored-by: Rachel Elledge <[email protected]>

Author: maayanagranat

content/embeds/rs-prometheus-metrics-v2.md

@@ -114,8 +114,10 @@
 | <span class="break-all">redis_server_connected_clients</span> | Number of client connections to the specific shard |
 | <span class="break-all">redis_server_connected_slaves</span> | Number of connected replicas |
 | <span class="break-all">redis_server_db_avg_ttl</span> | Average TTL of all volatile keys |
+| <span class="break-all">redis_server_db0_avg_ttl</span> | Average TTL of all volatile keys. Deprecated. |
 | <span class="break-all">redis_server_expired_keys</span> | Total count of volatile keys |
 | <span class="break-all">redis_server_db_keys</span> | Total key count. |
+| <span class="break-all">redis_server_db0_keys</span> | Total key count. Deprecated. |
 | <span class="break-all">redis_server_evicted_keys</span> | Keys evicted so far (since restart) |
 | <span class="break-all">redis_server_expire_cycle_cpu_milliseconds</span> | The cumulative amount of time spent on active expiry cycles |
 | <span class="break-all">redis_server_expired_keys</span> | Keys expired so far (since restart) |