Make slack notification message conditional on job status

Author: NlightNFotis

.github/workflows/release-packages.yaml

@@ -79,7 +79,7 @@ jobs:
           SLACK_COLOR: ${{ job.status }}
           SLACK_USERNAME: Github Actions CI bot
           SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
-          SLACK_MESSAGE: 'Ubuntu 20.04 package built and uploaded successfully'
+          SLACK_MESSAGE: "${{ job.status == 'success' && 'Ubuntu 20.04 package built and uploaded successfully' || 'Ubuntu 20.04 package build failed' }}"
 
   ubuntu-18_04-package:
     runs-on: ubuntu-18.04
@@ -167,7 +167,7 @@ jobs:
           SLACK_COLOR: ${{ job.status }}
           SLACK_USERNAME: Github Actions CI bot
           SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
-          SLACK_MESSAGE: 'Ubuntu 18.04 package built and uploaded successfully'
+          SLACK_MESSAGE: "${{ job.status == 'success' && 'Ubuntu 18.04 package built and uploaded successfully' || 'Ubuntu 18.04 package build failed' }}"
 
 
   homebrew-pr:
@@ -320,4 +320,4 @@ jobs:
           SLACK_COLOR: ${{ job.status }}
           SLACK_USERNAME: Github Actions CI bot
           SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
-          SLACK_MESSAGE: 'Docker Image built and submitted to DockerHub successfully'
+          SLACK_MESSAGE: "${{ job.status == 'success' && 'Docker Image built and submitted to DockerHub successfully' || 'Docker Image build failed' }}"