adding description and ranges for the dora dashboard (#7378)

* adding description and ranges for the dora dashboard

Signed-off-by: yoramshai <yoramshai@gmail.com>

* update MTTR when using 2023

* update MTTR vs FDRT

---------

Signed-off-by: yoramshai <yoramshai@gmail.com>
Co-authored-by: Lynwee <linwei.hou@merico.dev>
diff --git a/grafana/dashboards/DORA.json b/grafana/dashboards/DORA.json
index 6388cd7..da76f78 100644
--- a/grafana/dashboards/DORA.json
+++ b/grafana/dashboards/DORA.json
@@ -281,6 +281,7 @@
     },
     {
       "datasource": "mysql",
+      "description": "How often an organization deploys code to production or release it to end users\n\n# 2023 Benchmarks\n- **Elite**: >= 7 deployment days per week\n- **High**: >= 1 deployment day per week\n- **Medium**: >= 1 deployment day per month\n- **Low**: < 1 deployment day per month\n# 2021 Benchmarks\n- **Elite**: >= 7 deployment days per week\n- **High**: >= 1 deployment day per month\n- **Medium**: >= 1  deployment day per six months\n- **Low**: < 1 deployment day per six months",
       "fieldConfig": {
         "defaults": {
           "color": {
@@ -425,6 +426,7 @@
     },
     {
       "datasource": "mysql",
+      "description": "The median amount of time for a code change to be deployed into production.\n\n\n# 2023 Benchmarks\n- **Elite**: Less than one day\n- **High**: Between one day and one week\n- **Medium**: Between one week and one month\n- **Low**: More than one month\n# 2021 Benchmarks\n- **Elite**: Less than one hour\n- **High**: Less than one week\n- **Medium**: Between one week and six months\n- **Low**: More than six months\n",
       "fieldConfig": {
         "defaults": {
           "color": {
@@ -568,6 +570,7 @@
     },
     {
       "datasource": "mysql",
+      "description": "The percentage of changes that were made to a code that then resulted in incidents, rollbacks, or any type of production failure.\n\n# 2023 Benchmarks\n- **Elite**: (0, 5%]\n- **High**: (5%, 10%]\n- **Medium**: (10%, 15%]\n- **Low**: (15%, 100%]\n# 2021 Benchmarks\n- **Elite**: (0, 15%]\n- **High**: (16%, 20%]\n- **Medium**: (21%, 30%]\n- **Low**: (30%, 100%]\n",
       "fieldConfig": {
         "defaults": {
           "color": {
@@ -712,7 +715,7 @@
     },
     {
       "datasource": "mysql",
-      "description": "",
+      "description": "# MTTR benchmarks:\ndevlake.apache.org/docs/Metrics/MTTR#how-is-it-calculated\n# FDRT benchmarks:\ndevlake.apache.org/docs/Metrics/FailedDeploymentRecoveryTime#how-is-it-calculated\n",
       "fieldConfig": {
         "defaults": {
           "color": {