docs: add links to other language versions of README

[dowithless]

Added language selection links to the README for easier access to translated versions: German, Spanish, French, Japanese, Korean, Portuguese, Russian, and Chinese.

The updated can be previewed in my forked repository: https://github.com/dowithless/awesome-chatgpt-prompts/tree/patch-1

Add New Prompt

You'll need to add your prompt into README.md, and to the prompts.csv file. If
your prompt includes quotes, you will need to double-quote them to escape in CSV
file.

If the prompt is generated by AI, please add <mark>Generated by AI</mark> to
the end of the contribution line.

• I've confirmed the prompt works well
• I've added
  Contributed by: [@yourusername](https://github.com/yourusername)
• I've added to the README.md
• I've added to the prompts.csv
  • Escaped quotes by double-quoting them
  • No spaces after commas after double quotes. e.g. "Hello","hi", not
    "Hello", "hi"
  • Removed "Act as" from the title on CSV

Please make sure you've completed all the checklist.