Fix stack docs missing some placeholders (#1376)

Closes #1370

Author: julienduchesne

docs/data-sources/cloud_stack.md

@@ -50,7 +50,7 @@ available at “https://<stack_slug>.grafana.net".
 - `logs_status` (String)
 - `logs_url` (String)
 - `logs_user_id` (Number)
-- `name` (String) Name of stack. Conventionally matches the url of the instance (e.g. “<stack_slug>.grafana.net”).
+- `name` (String) Name of stack. Conventionally matches the url of the instance (e.g. `<stack_slug>.grafana.net`).
 - `org_id` (Number) Organization id to assign to this stack.
 - `org_name` (String) Organization name to assign to this stack.
 - `org_slug` (String) Organization slug to assign to this stack.

docs/resources/cloud_stack.md

@@ -26,9 +26,8 @@ resource "grafana_cloud_stack" "test" {
 
 ### Required
 
-- `name` (String) Name of stack. Conventionally matches the url of the instance (e.g. “<stack_slug>.grafana.net”).
-- `slug` (String) Subdomain that the Grafana instance will be available at (i.e. setting slug to “<stack_slug>” will make the instance
-available at “https://<stack_slug>.grafana.net".
+- `name` (String) Name of stack. Conventionally matches the url of the instance (e.g. `<stack_slug>.grafana.net`).
+- `slug` (String) Subdomain that the Grafana instance will be available at. Setting slug to `<stack_slug>` will make the instance available at `https://<stack_slug>.grafana.net`.
 
 ### Optional
 

internal/resources/cloud/resource_cloud_stack.go

@@ -52,7 +52,7 @@ func ResourceStack() *schema.Resource {
 			"name": {
 				Type:        schema.TypeString,
 				Required:    true,
-				Description: "Name of stack. Conventionally matches the url of the instance (e.g. “<stack_slug>.grafana.net”).",
+				Description: "Name of stack. Conventionally matches the url of the instance (e.g. `<stack_slug>.grafana.net`).",
 			},
 			"description": {
 				Type:        schema.TypeString,
@@ -62,9 +62,8 @@ func ResourceStack() *schema.Resource {
 			"slug": {
 				Type:     schema.TypeString,
 				Required: true,
-				Description: `
-Subdomain that the Grafana instance will be available at (i.e. setting slug to “<stack_slug>” will make the instance
-available at “https://<stack_slug>.grafana.net".`,
+				Description: "Subdomain that the Grafana instance will be available at. " +
+					"Setting slug to `<stack_slug>` will make the instance available at `https://<stack_slug>.grafana.net`.",
 				ValidateFunc: validation.All(
 					validation.StringMatch(stackSlugRegex, "must be a lowercase alphanumeric string and must start with a letter."),
 					validation.StringLenBetween(1, 29),