Have you read the Contributing Guidelines on issues?

• I have read the Contributing Guidelines on issues.

Prerequisites

• I'm using the latest version of Docusaurus.
• I have tried the npm run clear or yarn clear command.
• I have tried rm -rf node_modules yarn.lock package-lock.json and re-installing packages.
• I have tried creating a repro with https://new.docusaurus.io.
• I have read the console error message carefully (if applicable).

Description

The built site does not have og:locale and og:locale:alternate meta tags in the Head.

Reproducible demo

https://codesandbox.io/p/sandbox/zen-wildflower-kpuv6l?file=%2FREADME.md

Steps to reproduce

1. Add at least two locales to docusaurus.config.js.
   e.g.

i18n: {
    defaultLocale: "en",
    locales: ["en", "hu"],
    localeConfigs: {
      en: {
        label: "English",
        direction: "ltr",
        htmlLang: "en-US",
        calendar: "gregory",
      },
      hu: {
        label: "Magyar",
        direction: "ltr",
        htmlLang: "hu-HU",
        calendar: "gregory",
        path: "hu",
      },
    },
  },

2. Build
3. Serve

Expected behavior

In the built site pages in the Head tag og:locale and og:locale:alternate meta tags are present.

 <meta property="og:locale" content="en_US" />
 <meta property="og:locale:alternate" content="hu_HU" />

Actual behavior

In the built site pages in the Head tag og:locale and og:locale:alternate meta tags are not present.

Your environment

• Public source code: no public code
• Public site URL: no public site
• Docusaurus version used: 2.4.0
• Environment name and version (e.g. Chrome 89, Node.js 16.4):
  • Microsoft Edge Version 112.0.1722.39 (Official build) (64-bit)
  • node --version: v18.13.0
• Operating system and version (e.g. Ubuntu 20.04.2 LTS):
  • Edition Windows 11 Enterprise
  • Version 22H2
  • OS build 22621.1413

Self-service

• I'd be willing to fix this bug myself.