Update template parameters documentation (#10545) (#7301)

[upstream:2abb74f38b67c029192384957da4a3fe9c9ce093]

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

Author: modular-magician

website/docs/r/dataflow_flex_template_job.html.markdown

@@ -95,9 +95,9 @@ Template.
 
 * `autoscaling_algorithm` - (Optional) The algorithm to use for autoscaling.
 
-* `parameters` - (Optional) Key/Value pairs to be passed to the Dataflow job (as
-used in the template). Additional [pipeline options](https://cloud.google.com/dataflow/docs/guides/specifying-exec-params#setting-other-cloud-dataflow-pipeline-options)
-such as `serviceAccount`, `workerMachineType`, etc can be specified here.
+* `parameters` - **Template specific** Key/Value pairs to be forwarded to the pipeline's options; keys are
+  case-sensitive based on the language on which the pipeline is coded, mostly Java.
+  **Note**: do not configure Dataflow options here in parameters.
 
 * `enable_streaming_engine` - (Optional) Immutable. Indicates if the job should use the streaming engine feature.
 

website/docs/r/dataflow_job.html.markdown

@@ -99,7 +99,9 @@ The following arguments are supported:
 
 - - -
 
-* `parameters` - (Optional) Key/Value pairs to be passed to the Dataflow job (as used in the template).
+* `parameters` - **Template specific** Key/Value pairs to be forwarded to the pipeline's options; keys are
+  case-sensitive based on the language on which the pipeline is coded, mostly Java.
+  **Note**: do not configure Dataflow options here in parameters.
 * `labels` - (Optional) User labels to be specified for the job. Keys and values should follow the restrictions
    specified in the [labeling restrictions](https://cloud.google.com/compute/docs/labeling-resources#restrictions) page.
    **Note**: This field is non-authoritative, and will only manage the labels present in your configuration. Please refer to the field `effective_labels` for all of the labels present on the resource.