Feature/grafana plugin integration (#197)

* update the grafana_plugin.md page

* update the file name to fix the url

* delete the grafana_plugin.md file

* update the openobserve-plugin-for-grafana.md file

* fix: numbered list issue

---------

Co-authored-by: Debashis Borgohain <[email protected]>

Author: ktx-krupa

docs/images/explore-logs-openobserve-plugin.png

@@ -3,7 +3,7 @@ nav:
     - Systemd: systemd.md
     - SIMD: simd.md
     - Mimalloc: mimalloc.md
-    - Grafana plugin: grafana_plugin.md
+    - Grafana plugin: openobserve-plugin-for-grafana.md
     - Etcd maintenance: etcd.md
     - Etcd restore: etcd_restore.md
     - Nginx proxy: nginx_proxy.md

docs/images/openobserve-data-source-config.png

@@ -3,7 +3,7 @@ Learn more:
 - [Systemd](systemd)
 - [SIMD](simd)
 - [Mimalloc](mimalloc)
-- [Grafana plugin](grafana_plugin)
+- [Grafana plugin](openobserve-plugin-for-grafana)
 - [Etcd maintenance](etcd)
 - [Etcd restore](etcd_restore)
 - [Nginx proxy](nginx_proxy)