Meta og:locale shouldn't contain name property

[honzabilek4]

Version

v5.3.0

Reproduction link

https://codesandbox.io/s/z38klo3lrx

Steps to reproduce

Meta tags are included by default, when using the plugin.

What is expected ?

The og:locale meta tag should look like following:
<meta property="og:locale" content="en_GB" />
More info:
http://ogp.me/#optional

What is actually happening?

The tag has currently the following format:
<meta data-n-head="true" data-hid="og:locale" name="og:locale" property="og:locale" content="en_US"> Where the name is an extraneous attribute and the whole tag is being ignored.

Here's an output from facebook sharing debugger:

Additional comments?

Is there any reason why the name attribute is present?
If not, I'll add a pull request for this.

_{This bug report is available on Nuxt community (#c206)}