Fix path about drive letter for Windows

[okathira]

Fixes #1518

What is the purpose of this PR?

• Fix bug
• Fix typo
• Update specs
• Add new rule
• Add new parser
• Improve or refactor rules
• Add a new core feature
• Improve or refactor core features
• Update documents
• Others

Description

Make the extension work regardless of which drive the open location is on.

Excuse me, still I have yet to check the extension in real action. Is there way to do it on Windows?

Checklist

Fill out the checks for the applicable purpose.

• Fix bug
  • Add the test that can check whether resolved the issue.
• Update specs
  • Element
    • Update global attributes
    • Update content models
    • Add also ARIA that you explored ARIA in HTML Recommendation and Editor's draft
  • Attribute
    • Update global attributes
    • Update IDL attribute
• Add new rule
  • Add a test
  • Add a README document
    • Create an issue that requests translating the doc if you want.
  • Add to index
  • Add JSON schema to schema.json
  • Add to @markuplint/config-presets
    • And add to Rulesets of base presets
      • Add to a doc file
      • Add to a doc file (ja), or create an issue that requests translating the doc if you want.
  • Add to the Playground
    • Add to a config object
• Add new parser
  • Add a test
    • Do a test with some parser.
  • Add to initializer

[YusukeHirao]

@okathira

Thank you for your contribution!
It seems that the CI tests are failing.
Could you please make the necessary adjustments to your pull request?

[okathira]

@YusukeHirao
I checked CI on the current dev branch, I have the same results.
So what should I do?
checked CI: https://github.com/okathira/markuplint/pull/2/checks
(I dont have checked details of the results yet...)

[okathira]

I created another issue about the CI tests failing #1534

[YusukeHirao]

@okathira
Please merge the latest dev branch. The tests will likely run successfully.

[okathira]

@YusukeHirao
I rebased and force pushed. Please run the tests.

[YusukeHirao]

@okathira Thank you!