Merge pull request hashicorp#11175 from kevinwojo/patch-azure-auto-join

Update docs: correct provider argument is tag_key

Author: mrspanishviking

website/content/docs/install/cloud-auto-join.mdx

@@ -147,7 +147,7 @@ endpoint](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instance-identity-d
 ### Microsoft Azure
 
 This returns the first private IP address of all servers in the given region
-which have the given `tag_name` and `tag_value` applied to their virtual NIC in the tenant and subscription, or in
+which have the given `tag_key` and `tag_value` applied to their virtual NIC in the tenant and subscription, or in
 the given `resource_group` of a `vm_scale_set` for Virtual Machine Scale Sets.
 
 ```shell-session
@@ -157,7 +157,7 @@ $ consul agent -retry-join "provider=azure tag_key=... tag_value=... tenant_id=.
 ```json
 {
   "retry_join": [
-    "provider=azure tag_name=... tag_value=... tenant_id=... client_id=... subscription_id=... secret_access_key=..."
+    "provider=azure tag_key=... tag_value=... tenant_id=... client_id=... subscription_id=... secret_access_key=..."
   ]
 }
 ```
@@ -176,7 +176,7 @@ Variables can also be provided by environmental variables:
 
 Use these configuration parameters when using tags:
 
-- `tag_name` - the name of the tag to auto-join on.
+- `tag_key` - the name of the tag to auto-join on.
 - `tag_value` - the value of the tag to auto-join on.
 
 Use these configuration parameters (instead of `tag_name` and `tag_value`) when using Virtual Machine Scale Sets (Consul 1.0.3 and later):