website: fix myawesomecloud reference

When updating the docs in prevision for Packer 1.11.0, we changed the
templates that show how plugins are installed/discovered with commands
like packer init.

While doing so, a template had its component renamed to coolcloud, but
the following prose did not change, making the text inconsistent.

Since there are other mentions of myawesomecloud in the codebase, we
choose to settle on this one for that example too.

website/content/docs/plugins/install-plugins.mdx

@@ -178,9 +178,9 @@ Here is an example `required_plugins` block:
 ```hcl
 packer {
   required_plugins {
-    coolcloud = {
+    myawesomecloud = {
       version = ">= 2.7.0"
-      source = "github.com/hashicorp/coolcloud"
+      source = "github.com/hashicorp/myawesomecloud"
     }
     happycloud = {
       version = ">= 1.1.3"