Edits for docs consistency in Metrics Dashboards

doc/operations/metrics/dashboards/panel_types.md

@@ -62,12 +62,10 @@ panel_groups:
             query_range: 'http_requests_total'
             label: '# of Requests'
             unit: 'count'
-        metrics:
           - id: anomaly_requests_upper_limit
             query_range: 10000
             label: 'Max # of requests'
             unit: 'count'
-        metrics:
           - id: anomaly_requests_lower_limit
             query_range: 2000
             label: 'Min # of requests'

doc/operations/metrics/dashboards/variables.md

@@ -8,7 +8,9 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 ## Query variables
 
-Variables can be specified using double curly braces, such as `"{{ci_environment_slug}}"` ([added](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/20793) in GitLab 12.7).
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/20793) in GitLab 12.7.
+
+Variables can be specified using double curly braces, such as `"{{ci_environment_slug}}"`.
 
 Support for the `"%{ci_environment_slug}"` format was
 [removed](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/31581) in GitLab 13.0.
@@ -66,5 +68,5 @@ avg(sum(container_memory_usage_bytes{container_name!="{{pod}}"}) by (job)) witho
 The URL for this query would be:
 
 ```plaintext
-http://gitlab.com/<user>/<project>/-/environments/<environment_id>/metrics?dashboard=.gitlab%2Fdashboards%2Fcustom.yml&pod=POD
+https://gitlab.com/<user>/<project>/-/environments/<environment_id>/metrics?dashboard=.gitlab%2Fdashboards%2Fcustom.yml&pod=POD
 ```

doc/operations/metrics/dashboards/yaml.md

@@ -14,7 +14,7 @@ Dashboards have several components:
 
 The following tables outline the details of expected properties.
 
-## **Dashboard (top-level) properties**
+## Dashboard (top-level) properties
 
 | Property | Type | Required | Description |
 | ------ | ------ | ------ | ------ |
@@ -23,7 +23,7 @@ The following tables outline the details of expected properties.
 | `templating` | hash | no | Top level key under which templating related options can be added. |
 | `links` | array | no | Add links to display on the dashboard. |
 
-## **Templating (`templating`) properties**
+## Templating (`templating`) properties
 
 | Property | Type | Required | Description |
 | -------- | ---- | -------- | ----------- |
@@ -31,7 +31,7 @@ The following tables outline the details of expected properties.
 
 Read the documentation on [templating](templating_variables.md).
 
-## **Links (`links`) properties**
+## Links (`links`) properties
 
 | Property | Type | Required | Description |
 | -------- | ---- | -------- | ----------- |
@@ -41,7 +41,7 @@ Read the documentation on [templating](templating_variables.md).
 
 Read the documentation on [links](index.md#add-related-links-to-custom-dashboards).
 
-## **Panel group (`panel_groups`) properties**
+## Panel group (`panel_groups`) properties
 
 Dashboards display panel groups in the order they are listed in the dashboard YAML file.
 
@@ -55,7 +55,7 @@ is no longer used.
 
 Panels in a panel group are laid out in rows consisting of two panels per row. An exception to this rule are single panels on a row: these panels take the full width of their containing row.
 
-## **Panel (`panels`) properties**
+## Panel (`panels`) properties
 
 Dashboards display panels in the order they are listed in the dashboard YAML file.
 
@@ -72,7 +72,7 @@ is no longer used.
 | `metrics` | array | yes | The metrics which should be displayed in the panel. Any number of metrics can be displayed when `type` is `area-chart` or `line-chart`, whereas only 3 can be displayed when `type` is `anomaly-chart`. |
 | `links` | array | no | Add links to display on the chart's [context menu](index.md#chart-context-menu). |
 
-## **Axis (`panels[].y_axis`) properties**
+## Axis (`panels[].y_axis`) properties
 
 | Property    | Type   | Required                      | Description                                                          |
 | ----------- | ------ | ----------------------------- | -------------------------------------------------------------------- |
@@ -80,7 +80,7 @@ is no longer used.
 | `format`    | string | no, defaults to `engineering` | Unit format used. See the [full list of units](yaml_number_format.md). |
 | `precision` | number | no, defaults to `2`           | Number of decimal places to display in the number.                                          |                        |
 
-## **Metrics (`metrics`) properties**
+## Metrics (`metrics`) properties
 
 | Property | Type | Required | Description |
 | ------ | ------ | ------ | ------ |