chore(dogfood): pin coderd provider to >= 0.0.13 (#22704)

Pins the `coder/coderd` Terraform provider in `dogfood/main.tf` to `>=
0.0.13`.

Previously there was no version constraint at all. The latest release
[v0.0.13](https://github.com/coder/terraform-provider-coderd/releases/tag/v0.0.13)
includes:
- `workspace_sharing` attribute on `coderd_organization` resource
- `cors_behavior` support on template resource
- Dependency updates (coder/coder SDK bumped to v2.29.2, various
Terraform plugin framework updates)

---------

Co-authored-by: blink-so[bot] <211532188+blink-so[bot]@users.noreply.github.com>

dogfood/main.tf

@@ -1,7 +1,8 @@
 terraform {
   required_providers {
     coderd = {
-      source = "coder/coderd"
+      source  = "coder/coderd"
+      version = ">= 0.0.13"
     }
   }
   backend "gcs" {