docs(error/nobase): tag base wasn't displayed properly

[saamed]

Replaced < with &lt and > with >

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[googlebot]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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[saamed]

I signed it!

[googlebot]

CLAs look good, thanks!

[googlebot]

CLAs look good, thanks!

[petebacondarwin]

It looks like it is rendering properly for me...

You should not need to escape HTML characters in code blocks.

[Narretz]

@petebacondarwin In the code block above the Description, there's a gap where <base> should be. I tried to fix this before. Let me see if I still have a branch with a fix.

[petebacondarwin]

OK but that is not the problem that this PR is trying to fix

[Narretz]

See #14033