docs/resource/aws_kinesis_video_stream: Fix example HCL formatting

Previously:

```
website/docs/r/kinesis_video_stream.html.markdown:17
Unexpected differences in website HCL formatting.
To see the full differences, run: terrafmt diff ./website --pattern '*.markdown'
To automatically fix the formatting, run 'make website-lint-fix' and commit the changes.
GNUmakefile:136: recipe for target 'website-lint' failed
make: *** [website-lint] Error 1
The command "make website-lint" exited with 2.
```

Author: bflad

website/docs/r/kinesis_video_stream.html.markdown

@@ -16,10 +16,10 @@ For more details, see the [Amazon Kinesis Documentation][1].
 
 ```hcl
 resource "aws_kinesis_video_stream" "default" {
-	name                    = "terraform-kinesis-video-stream"
-	data_retention_in_hours = 1
-	device_name             = "kinesis-video-device-name"
-	media_type              = "video/h264"
+  name                    = "terraform-kinesis-video-stream"
+  data_retention_in_hours = 1
+  device_name             = "kinesis-video-device-name"
+  media_type              = "video/h264"
 
   tags = {
     Name = "terraform-kinesis-video-stream"