fix(keybinding): fixed addRemoveComment for linux

[YuryShkoda]

Issue

• Line commenting implemented in the extension wasn't triggered in Linux.

Intent

• Fix keybinding for Linux.

Implementation

• keybindings section of the package.json has been updated.

Checks

• [x] Code is formatted correctly (npm run lint).
• [x] All unit tests are passing (npm run test:unit).
• [x] Reviewer is assigned.

[sasjsbot]

:tada: This PR is included in version 2.4.2 :tada:

The release is available on:

• Visual Studio Marketplace
• GitHub release

Your semantic-release bot :package::rocket: