chore: add .vsix file to release

[richard-ramos]

No description provided.

[arnetheduck]

?

[richard-ramos]

When using the dryRun value to just build the extension, the docs for this github action state the following wrt pat:

When using this option set the pat option to a stub value.

pat would only have a valid personal access token when you intend to publish the extension to one of the market places, and then, it would look like this:

- name: Publish to Open VSX Registry
        uses: HaaLeo/publish-vscode-extension@v1
        with:
          pat: ${{ secrets.OPEN_VSX_TOKEN }}
- name: Publish to Visual Studio Marketplace
        uses: HaaLeo/publish-vscode-extension@v1
        with:
          pat: ${{ secrets.VS_MARKETPLACE_TOKEN }}
          registryUrl: https://marketplace.visualstudio.com