Update naming.mdx (#1037)

Typo in text

Author: rnelson0

website/docs/plugin/sdkv2/best-practices/naming.mdx

@@ -66,7 +66,7 @@ verbs if the attribute is specifying whether to take some action, as with the
 `delete_on_termination` flag within the `root_block_device` block.
 
 Boolean attributes are ideally oriented so that `true` means to do something
-and `false` means not to do it; it can be confusing do have "negative" flags
+and `false` means not to do it; it can be confusing to have "negative" flags
 that prevent something from happening, since they require the user to follow
 a double-negative in order to reason about what value should be provided.