chore: fix required flag in docs and update wording from provider

Author: mariux

README.md

@@ -844,13 +844,11 @@ This is due to some terraform limitation and we will update the module once terr
 
   - [**`key_prefix`**](#attr-autolink_references-key_prefix): *(**Required** `string`)*<a name="attr-autolink_references-key_prefix"></a>
 
-    The key prefix of the autolink reference.
+    This prefix appended by a number will generate a link any time it is found in an issue, pull request, or commit.
 
-  - [**`target_url_template`**](#attr-autolink_references-target_url_template): *(Optional `string`)*<a name="attr-autolink_references-target_url_template"></a>
+  - [**`target_url_template`**](#attr-autolink_references-target_url_template): *(**Required** `string`)*<a name="attr-autolink_references-target_url_template"></a>
 
-    The target url template of the autolink reference.
-
-    Default is `""`.
+    The template of the target URL used for the links; must be a valid URL and contain `<num>` for the reference number.
 
 ### Module Configuration
 

README.tfdoc.hcl

@@ -1096,15 +1096,15 @@ section {
             required    = true
             type        = string
             description = <<-END
-                The key prefix of the autolink reference.
+                This prefix appended by a number will generate a link any time it is found in an issue, pull request, or commit.
               END
           }
 
           attribute "target_url_template" {
+            required    = true
             type        = string
-            default     = ""
             description = <<-END
-                The target url template of the autolink reference.
+                The template of the target URL used for the links; must be a valid URL and contain `<num>` for the reference number.
               END
           }
         }