adding ansible types in documentation (#303)

Signed-off-by: Modular Magician <magic-modules@google.com>

plugins/modules/gcp_spanner_instance.py

@@ -52,6 +52,7 @@ options:
     - A unique identifier for the instance, which cannot be changed after the instance
       is created. The name must be between 6 and 30 characters in length.
     required: true
+    type: str
   config:
     description:
     - The name of the instance's configuration (similar but not quite the same as
@@ -61,21 +62,25 @@ options:
     - In order to obtain a valid list please consult the [Configuration section of
       the docs](U(https://cloud.google.com/spanner/docs/instances)).
     required: true
+    type: str
   display_name:
     description:
     - The descriptive name for this instance as it appears in UIs. Must be unique
       per project and between 4 and 30 characters in length.
     required: true
+    type: str
   node_count:
     description:
     - The number of nodes allocated to this instance.
     required: false
     default: '1'
+    type: int
   labels:
     description:
     - 'An object containing a list of "key": value pairs.'
     - 'Example: { "name": "wrench", "mass": "1.3kg", "count": "3" }.'
     required: false
+    type: dict
 extends_documentation_fragment: gcp
 notes:
 - 'API Reference: U(https://cloud.google.com/spanner/docs/reference/rest/v1/projects.instances)'