Update docs and CHANGELOG.md

CHANGELOG.md

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+## [v1.0.6](https://github.com/civo/terraform-provider-civo/releases/tag/v1.0.6) (9 December 2021)
+
+### Merged
+- [#113](https://github.com/civo/terraform-provider-civo/pull/113) - Add Data source for civo_firewall
+- [#108](https://github.com/civo/terraform-provider-civo/pull/108) - Replace the firewall if network id changes
+
 ## [v1.0.5](https://github.com/civo/terraform-provider-civo/releases/tag/v1.0.5) (9 November 2021)
 
 ### Merged

docs/data-sources/firewall.md

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+---
+# generated by https://github.com/hashicorp/terraform-plugin-docs
+page_title: "civo_firewall Data Source - terraform-provider-civo"
+subcategory: ""
+description: |-
+  Retrieve information about a firewall for use in other resources.
+  This data source provides all of the firewall's properties as configured on your Civo account.
+  Firewalls may be looked up by id or label, and you can optionally pass region if you want to make a lookup for an expecific firewall inside that region.
+---
+
+# civo_firewall (Data Source)
+
+Retrieve information about a firewall for use in other resources.
+
+This data source provides all of the firewall's properties as configured on your Civo account.
+
+Firewalls may be looked up by id or label, and you can optionally pass region if you want to make a lookup for an expecific firewall inside that region.
+
+
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Optional
+
+- **id** (String) The ID of this resource.
+- **name** (String) The name of the Kubernetes Cluster
+- **region** (String) The region where cluster is running
+
+### Read-Only
+
+- **network_id** (String) The id of the associated network
+
+