Bump MetaMask/action-is-release from 1 to 2 (#281)

Bumps [MetaMask/action-is-release](https://github.com/metamask/action-is-release) from 1 to 2.
- [Release notes](https://github.com/metamask/action-is-release/releases)
- [Changelog](https://github.com/MetaMask/action-is-release/blob/main/CHANGELOG.md)
- [Commits](MetaMask/action-is-release@v1...v2)

---
updated-dependencies:
- dependency-name: MetaMask/action-is-release
  dependency-version: '2'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -99,7 +99,7 @@ jobs:
       IS_RELEASE: ${{ steps.is-release.outputs.IS_RELEASE }}
     runs-on: ubuntu-latest
     steps:
-      - uses: MetaMask/action-is-release@v1
+      - uses: MetaMask/action-is-release@v2
         id: is-release
 
   publish-release: