Add import example (#3737) (#2265)

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/3737.txt

@@ -0,0 +1,4 @@
+```release-note:none
+Added an import example to show how to import Cloud Functions from other projects/regions.
+Originally commited as https://github.com/terraform-providers/terraform-provider-google/pull/6735 but it was requested by @c2thorn I propose the change here instead.
+```

website/docs/r/cloudfunctions_function.html.markdown

@@ -193,8 +193,9 @@ This resource provides the following
 
 ## Import
 
-Functions can be imported using the `name`, e.g.
+Functions can be imported using the `name` or `{{project}}/{{region}}/name`, e.g.
 
 ```
 $ terraform import google_cloudfunctions_function.default function-test
+$ terraform import google_cloudfunctions_function.default {{project}}/{{region}}/function-test
 ```