👷 Bump actions/first-interaction from 1 to 2

Bumps [actions/first-interaction](https://github.com/actions/first-interaction) from 1 to 2.
- [Release notes](https://github.com/actions/first-interaction/releases)
- [Commits](https://github.com/actions/first-interaction/compare/v1...v2)

---
updated-dependencies:
- dependency-name: actions/first-interaction
  dependency-version: '2'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/greetings.yml

@@ -9,7 +9,7 @@ jobs:
       issues: write
       pull-requests: write
     steps:
-      - uses: actions/first-interaction@v1
+      - uses: actions/first-interaction@v2
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
           issue-message: "Thanks for contributing to Blowfish"