adding keyring hint to the install.sh help page

[AntonOks]

Add the keyring update info, which is a continuous reoccurring confusion, see also https://forum.dlang.org/post/[email protected]

[dlang-bot]

Thanks for your pull request and interest in making D better, @AntonOks! We are looking forward to reviewing it, and you should be hearing from a maintainer soon.
Please verify that your PR follows this checklist:

• My PR is fully covered with tests (you can see the coverage diff by visiting the details link of the codecov check)
• My PR is as minimal as possible (smaller, focused PRs are easier to review than big ones)
• I have provided a detailed rationale explaining my changes
• New or modified functions have Ddoc comments (with Params: and Returns:)

Please see CONTRIBUTING.md for more information.

---

If you have addressed all reviews or aren't sure how to proceed, don't hesitate to ping us with a simple comment.

Bugzilla references

Your PR doesn't reference any Bugzilla issue.

If your PR contains non-trivial changes, please reference a Bugzilla issue or create a manual changelog.

[wilzbach]

Thanks! Though we really should improve the installer to auto-update or detect when the keyring/script has been upgraded.

[AntonOks]

Thanks! Though we really should improve the installer to auto-update or detect when the keyring/script has been upgraded.

true.
can you point me to the install.sh script?

[wilzbach]

https://github.com/dlang/installer/blob/master/script/install.sh