SUMO-233062: Update the dataType in field resource docs.

Author: AyanGhatak

website/docs/r/field.html.markdown

@@ -12,12 +12,10 @@ Provides a [Sumologic Field][1].
 ```hcl
 resource "sumologic_field" "field" {
   field_name = "string_field_1"
-  data_type = "String"
 }
 
 resource "sumologic_field" "field" {
   field_name = "int_field_1"
-  data_type = "Int"
 }
 ```
 
@@ -27,7 +25,7 @@ The following arguments are supported:
 
 - `field_name` - (Required)  Name of the field.
 - `field_id` - (Required) Field identifier.
-- `data_type` - (Optional) Field type. Possible values are `String`, `Long`, `Int`, `Double`, and `Boolean`.
+- `data_type` - (Optional) Field type. Currently only possible values is `String`.
 - `state` - (Optional) State of the field (either `Enabled` or `Disabled`).
 
 ## Import