docs: update app_autoscale and add certificate_issuer resource documentation

Author: infezek

docs/resources/app_autoscale.md

@@ -57,6 +57,7 @@ resource "tsuru_app_autoscale" "web" {
 - `cpu_average` (String) CPU average, for example: 20%, mean that we trigger autoscale when the average of CPU Usage of units is 20%.
 - `min_units` (Number) minimum number of units
 - `prometheus` (Block List) List of Prometheus autoscale rules (see [below for nested schema](#nestedblock--prometheus))
+- `scale_down` (Block List) Behavior of the auto scale down (see [below for nested schema](#nestedblock--scale_down))
 - `schedule` (Block List) List of schedules that determine scheduled up/downscales (see [below for nested schema](#nestedblock--schedule))
 - `timeouts` (Block, Optional) (see [below for nested schema](#nestedblock--timeouts))
 
@@ -82,6 +83,16 @@ Read-Only:
 - `prometheus_address` (String) Custom Prometheus URL. If not specified, it will use the default Prometheus from the app's pool
 
 
+<a id="nestedblock--scale_down"></a>
+### Nested Schema for `scale_down`
+
+Optional:
+
+- `percentage` (Number) Percentage of units to scale down
+- `stabilization_window` (Number) Stabilization window in seconds
+- `units` (Number) Number of units to scale down
+
+
 <a id="nestedblock--schedule"></a>
 ### Nested Schema for `schedule`
 

docs/resources/certificate_issuer.md

@@ -0,0 +1,42 @@
+---
+# generated by https://github.com/hashicorp/terraform-plugin-docs
+page_title: "tsuru_certificate_issuer Resource - terraform-provider-tsuru"
+subcategory: ""
+description: |-
+  Set a issuer to generate certificates to a tsuru application
+---
+
+# tsuru_certificate_issuer (Resource)
+
+Set a issuer to generate certificates to a tsuru application
+
+
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Required
+
+- `app` (String) Application name
+- `cname` (String) Application CNAME
+- `issuer` (String) Certificate Issuer
+
+### Optional
+
+- `timeouts` (Block, Optional) (see [below for nested schema](#nestedblock--timeouts))
+
+### Read-Only
+
+- `certificate` (List of String) Certificate Generated by Issuer, filled after the certificate is ready
+- `id` (String) The ID of this resource.
+- `ready` (Boolean) If the certificate is ready
+- `router` (List of String) Routers that are using the certificate
+
+<a id="nestedblock--timeouts"></a>
+### Nested Schema for `timeouts`
+
+Optional:
+
+- `create` (String)
+- `delete` (String)
+- `update` (String)