Change first-interaction props with underscore (#2723)

Signed-off-by: Avgustin Marinov <Avgustin.Marinov@bosch.com>

.github/workflows/first-interaction.yaml

@@ -16,9 +16,7 @@ jobs:
     steps:
       - uses: actions/first-interaction@v3
         with:
-          repo-token: ${{ secrets.PAT_SECRET }}
-          issue-message: |-
-            Thanks @${{ github.actor }} for submitting an issue to hawkBit!! Make yourself comfortable while I'm looking for a committer to assist you.
-          pr-message: |-
+          repo_token: ${{ secrets.PAT_SECRET }}
+          pr_message: |-
             Thanks @${{ github.actor }} for taking the time to contribute to hawkBit! We really appreciate this. Make yourself comfortable while I'm looking for a committer to help you with your contribution.
             Please make sure you read the [contribution guide](https://github.com/eclipse-hawkbit/hawkbit/blob/master/CONTRIBUTING.md) and signed the Eclipse Contributor Agreement (ECA).