up to date issue template

[tansy]

Please follow the guide below

• You will be asked some questions, please read them carefully and answer honestly
• Put an x into all the boxes [ ] relevant to your pull request (like that [x])
• Use Preview tab to see how your pull request will actually look like

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Before submitting a pull request make sure you have:

• Searched the bugtracker for similar pull requests
• [-] Read adding new extractor tutorial
• Read youtube-dl coding conventions and adjusted the code to meet them
• Covered the code with tests (note that PRs without tests will be REJECTED)
• Checked the code with flake8

In order to be accepted and merged into youtube-dl each piece of code must be in public domain or released under Unlicense. Check one of the following options:

• I am the original author of this code and I am willing to release it under Unlicense
• I am not the original author of this code but it is in public domain or released under Unlicense (provide reliable evidence)

What is the purpose of your pull request?

• Bug fix
• Improvement
• New extractor
• New feature

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Description of your pull request and other information

New issue templates still say 'Run youtube-dl --version and ensure your version is 2021.12.17' and people still use it as advised.
Therefore the update to that so it is clear what is newest/up to date version and where to get it.

If you accept it, the rest of templates will be adjusted same way.

[tansy]

As a side note, maybe that version part should be formulated: "put-your-version-here".