slack workflow status should fire even if job cancelled (#5525)

Author: cheukt

.github/workflows/main.yml

@@ -65,7 +65,7 @@ jobs:
     uses: viamrobotics/rdk/.github/workflows/license_finder.yml@main
 
   slack-workflow-status:
-    if: ${{ failure() }}
+    if: ${{ !success() }}
     name: Post Workflow Status To Slack
     needs:
       - test

.github/workflows/releasecandidate.yml

@@ -44,7 +44,7 @@ jobs:
       GCP_CREDENTIALS: ${{ secrets.GCP_CREDENTIALS }}
 
   slack-workflow-status:
-    if: ${{ failure() }}
+    if: ${{ !success() }}
     name: Post Workflow Status To Slack
     needs:
       - test

.github/workflows/stable.yml

@@ -61,7 +61,7 @@ jobs:
       GCP_CREDENTIALS: ${{ secrets.GCP_CREDENTIALS }}
 
   slack-workflow-status:
-    if: ${{ failure() }}
+    if: ${{ !success() }}
     name: Post Workflow Status To Slack
     needs:
       - test