[ESLint v8 Beta] missing rule documentation links

[mdjermanovic]

vscode-eslint version: v2.1.25
eslint version: v8.0.0-beta.2

When I open a file with linting errors, those rules have documentation links:

If I add some code that produces linting errors from other rules, those rules don't have links:

Steps to reproduce:

1. Clone https://github.com/mdjermanovic/vscode-docs-url
2. npm install (use --force if necessary)
3. Open this folder in VSCode and open index.js. There will be one linting error.
4. Add bar without semicolon. There will be three linting errors, but semi doesn't have a link.

I'd guess this is because only URLs from the first run are stored.